It is a wanker debate!!!
Bolt it if u like (=scared) or need to practice ground up …so it will lessen the impact in a way of accidents and crampons points scratches all over the “cliff”. By doing so you will be creating great place to get strong. When it matter like a lead in the Canadian Rockies (which is BOLTED all over the place) you wouldn’t need rescue which have a HIGHER impact. (hey we did the news couple of times last year…(=IMPACT!!!!))
Minimize the visual impact by using the painted bolts (man it happened to me time and time again that the section on the topo marked with bolt location and I couldn’t see it 2 feet away b/c of the color)
BTW I do have a hand drill that I use sometime nothing is wrong in drilling bat-hook, rivet, or holy disgrace …A…BOLT