Of course not, but that's a pretty naive view of how politics works. (Naive and cynical at the same time is a nice trick.)
On second- and third-tier issues, politicians take their cues from friendly activists and interest groups, for whatever "friendly" means to that particular elected. Think about how many politicians' reelection messages are basically bullet-points of small-bore asks delivered. Each individual item may not win many votes, exactly, but they create a general sense that the candidate is engaged and effective. And perhaps more importantly, it's hard for potential opponents to build support when the incumbent is delivering for the most engaged voters in the district. Anyways a politician needs to do something while in office; it might as well be the stuff that people they respect want.
So: you frame this issue, and how it's confluent with the broader [Democratic/Republican] outlook. You clarify the desired legislative outcome. You show some public support, which takes many fewer people than you might think, and set up some meetings. Hopefully you find a sponsor. Then repeat as necessary to get the bill introduced, voted on, and maybe even passed.
None of this is easy; it's a ton of work, and by no means guaranteed of success. It's especially difficult in today's US where so much gets bottled up behind partisan showboating. But it also happens all the time. See the traction the right-to-repair movement is getting.