When considering human-powered equipment, a healthy human can produce about 1.2 hp briefly (see orders of magnitude) and sustain about 0.1 hp indefinitely; trained athletes can manage up to about 2.5 hp briefly and 0.3 hp for a period of several hours.
That's a pretty good increase in preformance if it were an aftermarket mod/part, why scrimp on the go-power I figure? I pedal most of the time, whenever my gear range allows it & regardless of how much engine I may have and I pedal hard
just about every take off (intersection traffic)...
...which is particularly amusing w/my ebike as most don't realize it's motored as well & think I must be some sort of superman