> the big bang theory was dismissed for decades.

Dismissing a theory that is (now known to be) right is not necessarily political; it can be just a mistake. There are certainly cliques that are invested in believing the orthodoxy, but there are ways in the hard sciences of absolutely disproving that orthodoxy; and, though they are subject to fierce scrutiny, as they should be, they can be, and have been, accepted after surviving that scrutiny.

it can be but you offered no evidence contrary. the data WAS there, but it conflicted with their well established views, call them political or not - it doesn't matter.

it would take a great deal of hubris to say 'yes, all other sciences and research suffer from the human condition, but not physics!'