I don't know if we are talking about similar stuff or not, but yeah, I think not all hobbies should become one's dayjob. Or at least it depends on the person in question... I most certainly don't want to make writing fiction my job, it's my pressure valve and I definitely want to keep it as such. Even to the point where I might not want to get my books published by a publishing agency (yeah, I'm a published short story author but that's kinda different story there).One of my friends advised me to work on programming as a skill and I know I possess some level of knowledge in computer or mobile I mean fixing some problems by changing some settings or making my own changes as some level of customization with limited options (my knowledge sometimes is from internet or experienced persons but depends on my problems or my needs), before you guys ask me why I don't pick programming as one of my skills or even you ask I enjoy math, the is kinda tricky but I love jobs that comes with simple things I mean by time I learn new stuffs or tricks for Photoshop and I can even use this stuff for my hobby which I can have both world (modding & editing for my clients).
I once had a friend who didn't want to get commercially published either (well she doesn't write original stories to my knowledge, just fanfics so I guess it's a hypothetical statement anyway) and there was a time where I could not fully understand why. I still bet my reasons are different from hers but yup, I get why she said that. Some things are better left yours to enjoy and control.