Earlier quoted context omitted.
Machine are only "safer" for very specific definitions of that word. They force you into a specific path.
very specific definitions Ha! Hard to argue with that because you pluralized 'definition.' But what I mean is, (1) If I'm doing a chest exercise, for example, with 270+ pounds, and I fail on a machine, I can get out of it. With free weights, I need a spotter and it's much trickier. (2) Perhaps more important: If I'm doing heavy legs (450 lbs, for example), with free weights I have to load a lot of weight on my back f…
It's a bit like barefoot running vs shod running. Shoes protect your feet, so they are ostensibly safer. But they also make it easy to have bad technique and wreck your joints, especially your knees.
> (1) If I'm doing a chest exercise, for example, with 270+ pounds, and I fail on a machine, I can get out of it. With free weights, I need a spotter and it's much trickier.
Depends on what you are doing, and how you are doing it. The only real need for a spotter is for barbell bench pressing. There you can bench press in a squat rack with the safeties set to the right level. But there are lots of other exercises that provide a similar benefit without trapping you. E.g. (weighted) dips (on rings), push up variations, hand stand push ups, standing overhead presses.