I've f.up my MCL by not listening to my body and I have the stability of a typical 85 year old while I try and 'heal'. It takes longer as you get older (you're probably not 20 year old) and stupid stuff can really take you out.
bodybuilders can build muscle size with high reps and lower weight or lower reps and high weight as long as they do it close to failure with only a few reps in reserve (rir)
powerlifters, or those focusing on strength, usually go for high weight and lower reps because they might be training for a competition that focuses on 1 rep max and/or the body can really only handle so many reps when pushing it at 80-90% of 1 rep max
neither is inherently better but a matter of what goals you have in mind, plus, hypertrophy contributes to overall strength, too