I do long(ish) distance running as a hobby - it's not feasible to take a laptop out on a two hour run.

If I want to go meet a friend for a drink or food, I have to lug around a backpack, keep an eye on it to make sure it's not stolen. If I wanted to have a beer or wine, I can't because I may need to work at any point.

Favourite band is performing? I suppose you could take a backpack and the laptop to the venue, but again there's a chance it's pinched, and they'll make you check it at the cloakroom for the performance.

I use my pocket computer if something comes up. It's not nearly as pleasant to use, granted, but way more pleasant than carrying a laptop everywhere. But I also wouldn't hesitate to have a beer if the desire arose. Perhaps I'm just not as committed to my work as you.

> If I wanted to have a beer or wine, I can't because I may need to work at any point.

One beer or glass of wine renders you incapable? I'd be totally comfortable having 1-2 drinks on call.

> If I want to go meet a friend for a drink or food, I have to lug around a backpack, keep an eye on it to make sure it's not stolen. If I wanted to have a beer or wine, I can't because I may need to work at any point.

If this is a stated requirement from your employer, talk to a lawyer. This is a common litmus test for whether you need to be paid while on call, even if you aren't actively working. Depending on the jurisdiction you may be entitled to pay (or trigger a relaxation of your company's policies).

Does that apply to salaried/FLSA-exempt workers?

Depends on the jurisdiction, talk to a lawyer to find out.

Not the GP, but I was in a similar situation. It was a requirement to be able to get to the office if the situation required the lab to diagnose the problem.