I was ready to disagree, but he made a really good case. When he reached to the argument involving perfect form, I was encouraged to change my strategy for some exercises that I am not good at, such as pull ups and increase the sets and lower the reps instead.

i think what he is saying without saying is training nervous system pathways is the foundation of lasting strength progress.

I think it depends on the exercise too. Some exercises are worth the risk of training to failure. Think high risk such as deadlift/overhead snatch. More prone to serious injury

Yeah, this is the correct answer in almost all cases: it depends.

it of course bears mentioning that he is one of the most successful strength coaches in the world, with a team of people who study this stuff in control studies. while we are internet randos with opinions.