If you're a developer in a big/mid company (or a consultant regardless of company size) your input to the product will be minimum to non-existant. And even if it wasn't, maybe the problem at the base is something you don't believe is worth solving or being solved properly.
I've worked on client projects where I think the project is an utter waste of time and money, and other times worked on promising projects but led by terrible people who'd never manage to make it work. At the end of the day, work is work…
Isn't this up to you?