The average person nowadays is fat and lacks exercise. Of course burning that fat into muscle will make them way more confident and attractive.

I've always been physically active and had toned muscles. So I put on 20 lbs in a few months by strengthening my upper body, and it literally made zero difference. My confidence didn't explode and I got rejected by every girl I hit on as usual.

Now lifting is good advice, because it's within your control. There is no gym for your face, after all. But the benefits are overstated for guys like me.