High weights means a higher risk for injury, generally.
My injuries happened on light weights though when I didn't pay attention. I tend to be more focused and aware on heavy sets.
There was in fact another study where they measured the same thing (muscle and strength gains with bodybuilding or powerlifting style training) but they also controlled the volume, so both groups did the exact same amount of volume in every session.
Same results, (equal hypertrophy but better strength gains for powerlifting training), but with equal volume the session for the powerlifting training style took much longer.
Bodybuilding group did 3x10, took 30 minutes and wanted to train more afterwards (do more lifts).
Powerlifting group did 10x3, took 90 minutes and just wanted to go home when they were done with that lift.
So you although you get as much hypertrophy with powerlifting training with equal volume, it takes much longer time to reach that volume in a session and you prob don't have the motivation to do as much accessory lifts as if you would've trained lighter.