Linking a hobby project isn't necessarily meant to say anything about attitude at work. At work, the expected attitude might very well be that you have to bend over for and pamper customers and deal with no end of bullshit. Or maybe the expectation is that you never interact with customers directly, everything goes through customer support / sales / executives (after being checked by legal). A hobby project, by contrast, is your kingdom, and you can reject bullshit and/or have fun or just never respond to tickets without a patch because it's your free time and your pet project.
If I link my stuff or show it to a prospective employer, it's meant to show them that I can code. Nothing more. If they want to read too much into it and dismiss me as unprofessional because they found a cat meme, Theo quote, or link to hello.jpg, it's their loss not mine. Fuck 'em. Kinda unprofessional of them.
Plenty of people do exactly that: they point to work that they've made available for free on their GitHub as proof that they have the required skills and attitudes for professional work. The former Actix-web maintainer also used to do this, via their LinkedIn page. You can't have your cake and eat it too.