I bike for fun and to me, it's not a bike unless you pedal. If it's an appliance that you are using to get to work on time or to deliver goods, well sure, a throttle makes sense. Our ebikes have both a throttle and a PAS. Throttle assist can be useful for getting started.
Like Robert C, I don't understand the disdain for the cadence type pedal sensors. Mine feel fine to me, and would not be interested in shelling out the extra cost for torque sensing in a DIY kit, plus a torque sensor wouldn't work that well on my lower powered hub motors. Better for powerful DD motors where there is plenty of torque in reserve.