While I don't think the OP meant 24/7, I think the point remains that coding outside working hours is a choice borne purely out of personal interest. Having this interest is fine - maybe it makes you a better programmer or maybe it does not. Not having this interest is _also_ fine - and saying that people who don't have it are unfit to be in the field is just sitting on a high horse and looking down at others.

I just think if you enjoy programming in work, having it outside of work too risks ruining both your hobby and your job if you get burned out.

It's not even about wanting to do it. Doing anything on the metaphorical 24/7 will burn people out.

Yeah. I quite enjoy programming, and I'm quite good at it; as a result I quite enjoy my job and I get paid quite a lot. I'm very lucky!

And to help protect that, I carefully limit the amount of programming I do outside of work hours. The last thing I want is to burn out and stop enjoying my job! And also, there's an enormous number of enjoyable things in life (family, friends, crafts, etc.). Diversifying my hobbies is win/win.

I don't judge people who focus purely on programming, but I do suspect that they may find their views change over time.