Yeah, but you don't have to do these checks. If you forget to do the Chip IBIT test nothing bad happens, you just don't know if your chip detectors passed a continuity check. If you turn on the b/u pump and then do a lockpin check, you'll know it. And then you'll say "WTF?!?!" and realize that something is wrong. If you don't put the b/u pump in auto for the hyd leak check, you'll know. If you try and do the t/r servo check on apu vice main gens, you'll know.There are also things in our normal (not alert) checklist which have to be done in order, or at least have to be done a certain way, since one check may prevent you temporarily from doing another check (Chip IBIT interrupting master caution and Backup HYD pump for lockpin status comes to mind), so you can't just tackle "the closest alligator" with impunity... you have to do it in order, or at least have the forethought to know the implications of a certain check, what that limits you from doing and for how long, and be able to skip back and forth without missing anything.
While NATOPS doesn't recommend it, there's nothing stopping you from just going out, turning on the APU and then firing up the motors without do all the other checks. Good idea? Nope. Those checks are there for a reason. But the aircraft will start and fly without doing them.