@lddlells You're saying the current science is that training to failure is not necessary and yet one of the foremost doctors in this field is saying the exact opposite.
Galpin said in no uncertain terms you have to train to failure to achieve adaptation. The caveat to that is he said muscle soreness is a bad indicator of exercise quality. You can achieve adaptation without being overly sore. Training to failure does not necessarily mean you are overstressing yourself.
Example: my working sets vary in weight and reps based on how I am feeling. If I feel strain on tendons more than usual I drop the weight and increase reps. If I am feeling particularly solid and powerful that day I will substantially increase weight and reduce reps. In both scenarios, however, I am doing the number of reps necessary to fail. My last rep will either be a massive struggle or outright incomplete.
You are basically telling me I need to be open minded and take information with a grain of salt, but CLEARLY you haven't even listened to the information i referenced. Galpin doesn't necessarily disagree with what you are saying 100%. The original comment of "training to failure 3x a week is too much" is 100% BS though because i havr achieved massive gains training to failure 6 days a week and, according to the actual doctors, the CURRENT consensus in the community supports this.