I get doing things at a base level to say you can do it, but to not have some kind of backup safety that doesn't take away from the feat is not wise imo. If you have such things and eventually make a mistake and it keeps you alive to continue climbing, how is that a bad thing? Also, it's very insensitive and selfish to put yourself into a situation where if you do make a mistake and die, someone else has to take care of the results.