There is only so much someone can specialise in. If a candidate reads a UX design book thats less time for the JS: another 100 corner cases book, and they’ll flunk those fussy tests with 90% instead of the other guys 99%.
Realistically for max pay they will learn less about design and up their coding game learn the next NZXT.js thing and Watnot and stay sharp for interviews as just a full stack dev doing just 5 different jobs.
I mean agree. And I didn't necessarily mean that we'd want the frontend dev to do production design work. However, a savy UI dev that can prototype useful UI's, as well as make production UIs look and interact like production designs seems reasonable.
Realistically for max pay they will learn less about design and up their coding game learn the next NZXT.js thing and Watnot and stay sharp for interviews as just a full stack dev doing just 5 different jobs.