It’s not some crazy conspiracy. This is the whole point of winning elections. The people in charge of tech policy in this admin want universal fiber service. You don’t get tens of billions from Congress every year for that unless there’s public demand for it. Starlink would undermine that demand despite not being good enough to replace universal fiber service, in the eyes of the administration.
Also you’re free to look up how Starlink’s launch proposals have been slow rolled at the FCC. You can also look at the Republican Commissioner’s statements on the revocation of Starlink’s RDOF award.
this excludes a lot of the population outright since they don't have a payment plan for lower income users to afford it.
the FCC's letter says that they determined they could not deploy a system of the size they promised in the timeframe they promised. whether you agree with it or not, that assertion has been correct so far.
And the letter of course says that. That doesn’t mean it’s their real motive or a correct conclusion.