i've done singles / duos ... they were not Karaoke acts ... i programmed our drum machine , played left hand bass / right hand whatever , and sang ... my partner played keys , sax , sang backup ... more work and much more talent than most bands ... ( Classically / Berklee trained musicians )
and when i did try a single ( hated that ) i performed/recorded each and every band members part myself in my home studio ... ( mistakes and all , more like a real band ) yes , i play/own all those instruments and gear.
wanna add up those costs .... of not being Karaoke
a good smaller band does the work of a larger one = $$$ = get over it ... ( but i do agree , if some dolt steals mp3 files and just fakes playing , ... they should be castrated )
otherwise , i do agree ... except if you add in these costs ; decades of lessons , thousands of practice hours , 10's of thousands in equipment , music college , band clothes , band vans/trucks , etc ... let alone self employment taxes , costly self-pay health insurance , gear insurance , divorce costs from ' the life ' ... !