Like many things: It depends. From what I've seen: Many heavy lifters don't engage a full range of motion. Lifting heavy without engaging full range of motion results in a lot of strength over a limited range. Coupled with forgoing stretching (I rarely see guys who lift heavy do stretches) and you have a lack of flexibility. Bad combination for golf, I should think. Doesn't have to be that way. Witness Bryson DeChambeau.
i know heavy lifting is good for the soul . it can really help you feel whole. and what bryson is doing is clear. but for me i did not gain any distance.
I agree on the full range of motion, but not so much on anything else here. Especially "golf specific" exercises. All that is needed is a few main basic lifts done heavy to an full effective range of motion, a few helpful accessory movements to compliment the main movements.A lot of what Byson's doing is specifically aimed at improvement for swinging a club. Unfocused weight training won't do it. In resuming my workouts last month, I've added three new things that are golf-specific.
Lifting heavy is good. You just need to work with somebody who knows what they're doing.
Also, semi-related, I know Bryson is getting a lot of attention, but I don't think he's very strong or lifting anything particularly heavy. Just from what I've seen of his workouts.