Here's a list of people who are both famous and polarizing, along with their number of credible claims of sexual assault.
1. Elon Musk - 1
2. Donald Trump - 26
3. Kanye West - 0 known
4. Greta Thunberg - 0 known
5. Joe Rogan - 0 known
6. Jordan Peterson - 0 known
7. Alexandria Ocasio-Cortez - 0 known
8. Andrew Tate - < 10
9. Vladimir Putin- 0 known
10. Mark Zuckerberg - 0 known
The idea that just being famous and polarizing attracts false allegations, is false.
I think your argument is spot on, but there is important context which can be revealed by doing the same list for assassination attempts. Trump is qualitatively different from these other people - it just isn't because he is famous and polarising.
And Vladamir Putin (0), seriously? Good luck to anyone who attempts to make a public accusation against him. There will be a fatal fall through a window in their future. He could have raped 200 women and nobody would say a thing.
There is no incentive to make up allegations against most of those people. But if you make up a false allegation against a presidential candidate, it could cost him the election and move national politics in the direction you favor. How many allegations did Trump have against him before vs. after running for president?