That’s a Pl/Oly mindset rather than a BB/hypertrophy mindset. Totally valid advice in the right context.

Long story short, failed reps get much more risky and problematic as the weight you’re lifting approaches your 1RM.

Exactly this. When I was in my best shape my deadlift and squat were in/on the way to 2.5-3x my body weight. You don’t want to fail that without a lot of help and safeties.

Note for the uninitiated: That figure is not even impressive or competitive with competition lifters. This is just “guy who put in the time and work” numbers.