When I taught UX graduate students we certainly tried to instill in junior designers that their chief responsibility is to their end-users. And where it doesn't negatively influence their users their secondary responsibility to the business. Coming it at a distant third is their own sensibilities and satisfaction. Putting business needs above your users makes you a black-hat designer peddling dark patterns. Putting personal sensibilities over either makes you a digital artist -- not inherently a bad thing but also not what most companies are looking for.

Frankly many junior developers seem to have missed this lesson as well. I've seen countless rewrites for personal satisfaction or learning rather than concrete end-user or business goals.