Also, in practice, they're usually only good at one or two of the things on the list (at best) and hack their way through the rest. As much as people make fun of overspecialization, it happens in every field for a reason.
Eh, not sure if this is true at all. I think the reality is that niche specialized roles are valuable (frontend expert) but you are not "hacking" your way in full stack unless you are a junior or just bad at development.
I don't consider myself to be hacking anything I do, even things I'm not as strong in (ci cd) I pay full attention to documentation and examples before blinding coding or writing ci scripts
Start saying no. If you don't know how, start learning. It's hurting everyone up and down the industry.
I am almost purely focussed on creating DNNs ("deep neural networks" for the unaware) and it's almost always a nightmare work-wise, even without all the rest of the other crap.