If you were a little less deceptive, (or maybe just more informed?), you would have taken that into account.

https://www.cyclehelmets.org/1012.html

The premise that helmets save lives is by extrapolation from research that has suggested that helmets might reduce injuries to the head. As most fatalities involve head injury (this applies to all major external causes of violent death, not especially cycling), the reasoning is that by reducing injuries to the head, cycle helmets can lead to fewer cyclist deaths.

Whole population statistics for cycling fatalities do not support the above hypothesis.

Long-term analyses of fatalities in Canada [8], New Zealand [9] and USA [10] [11] show no helmet benefit; indeed, one study [11] suggests helmeted cyclists are more likely to be killed. Although fatality rates have generally declined, cyclists have fared no better than pedestrians. In Great Britain, too, there has been no discernible improvement in fatality trends relative to pedestrians as helmets have become more common [12] [13] .

In New South Wales, Australia in the three years following the introduction of its helmet law, 80% of cyclists killed and 80% of those seriously injured wore helmets at the time [3] [4]. These proportions are almost identical to wearing rates in street surveys (85% and 83% for adults in 1992 and 1993 respectively; 76% and 74% for children [3] [5]), suggesting that helmets had little effect on the likelihood of fatal or serious injury.

In Western Australia where bicycle helmets have been mandatory for all ages since July 1992, the annual cyclist death toll from 1987 to 1991 (pre-law) averaged 7.6 fatalities per year. From 1993 to 1997 (post-law) it was 6.4 fatalities per year, representing a 16% reduction [6]. Government cycling surveys show cycling declined in Western Australia by approximately 30% during the 1990s following mandatory helmet law enforcement [7]. Thus the increase in helmet wearing as a result of the law did not reduce fatalities relative to cycle use and may have led to an increase.

Comparing Australia-wide fatalities in 1988 (before any helmet law) with 1994 (when all states had enforced laws and about 80% helmet wearing), cyclist, pedestrian and all road user deaths fell by 35%, 36% and 38% respectively. Head injury deaths fell by 30%, 38% and 42%. Despite very high helmet use, the reductions for cyclists were less than for the other road users [17]. The differences are much greater still if the considerable fall in cycle use as a result of the helmet laws is taken into account.

Without a doubt, my helmet was designed to withstand that impact. It saved my life, or, at least saved my skull from shattering, both equally pretty bad in terms of injury.

How is that any different from someone falling off their bike, or being bounced off a car and then falling due to gravity, hitting their head on the pavement

b) did you ever take a physics course - just wondering who I'm speaking to here.

How is that any different from someone falling off their bike, or being bounced off a car, and then falling with a vertical component due to gravity, hitting their head on the pavement? Obviously, you can get hit by a car going 20mph in a horizontal direction, and, after being bounced (your body took the direct impact, not your head), your vertical velocity of travel isn't going to be 20mph in most cases - it will be a velocity proportional to the effects of gravity.

Road cyclists do not wear full face helmets. This is not because they are not safer, it is for the same reasons many experienced cyclists do not wear helmets at all.

The OP started this thread as if this debate and these arguments, every last one of them, hadn't been published ad naseum before his post.

A conventional helmet, such as a motorcycle helmet, provides good protection from impact injuries but provides little protection against rotational injury or Diffuse Axonal Injury (DAI) which is severe brain damage.
PHPS is a radical development in helmet design. It adds a lubricated flexible membrane over the outside of the helmet, and it is proven to add up to 60% more protection against brain injury.
A blow to the head causes a sharp and immediate rotation of the skull and the brain, which has potentially devastating and untreatable effects on soft brain tissue and blood vessels which can literally be ripped apart by the shearing forces inside the brain and the movement of the brain within the skull.

The lubricant and elastic quality of the PHPS membrane on a crash helmet decreases this rotational force in the critical milliseconds following impact, significantly reducing the head trauma and reducing the risk of traumatic brain injury.