To be clear more clear about bike weight, UCI requires the bike to be at least 6.8kg or about 15 pounds. You can have a heavier bike for sanctioned competitions, but not a lighter bike. But if you aren't ever going to be doing sanctioned competition events, then you can have as light a bike as you care to pay for.

As for position, I feel that many just don't give a aggressive position a chance. It's something you have to get use to.

Getting lower requires some effort on your part. I didn't get lower my first try and like it. However I saw the benefits with energy savings for the long haul rides and just the fact that I could more efficiently transfer power to the pedals. So I worked on getting there.

Biggest factor for me staying low and aero though is my gut. When I have a big gut from my winter slowdown, it's more annoying to be in a more aggressive position. Also long cranks which most people tend to like is more uncomfortable for me. It's a minor reason why I continue to use 165 mm cranks even though I have a 34.5" inseam and am 71" tall.