The core issue is that politically you gain nearly no votes and definitely no money by running with regulation as a pillar of your campaign.
In fact, doing so will often times end up bringing donations from relevant industries directly to your opponent.
Now, this system of perverse incentive and legal bribery should be fixed at the constitutional level but thats a gigantic can of worms.
In the current system there are two methods that can circumvent the issue. The first is one deployed by the likes of Elizabeth Warren; run your campaign on a broad array of "fighting for your constituents" and don't get specific until you see already elected and drafting a bill.
The second path is underutilized and should be done more: lie out your ass to the moneyed interests. Take their money, make them promises, eat at their fancy dinners, befriend them, laugh at their awful jokes. Then just fucking dunk on them in the legislature, as quietly as possible. Make a big show of being forced to, keep the charade going as long as possible.
The inverse of this has been done a lot recently, with Sinema, with Fetterman. But the good version is quite rare, and a good opportunity to make our country a better place.
Key notes: tough to do in bigger positions because they're rarely the first public office seats people hold, so track records build. Tough to do in many districts because voters can be rubes who actively agree with the corporations stomping on their nards. Tough to do if you make too large of a profile(not really a concern).