If Hallmark gives in to political correctness, they’ll lose 80% or more of their viewers.
What is political correctness? If they have a few movies with Black actors instead of Whites, their audience won't turn them off. Gay stories are more iffy, as interracial relationships can be, but I doubt they're going to start making movies about slavery or the Indian Wars or colonialism. If they push a political line at the expense of romance, audiences will turn them off, but they'd have to be very stupid to do that.
I’d guess LGBT rom-com formulas would play well in Middle America, who hold out hope for an idyllic life for their LBGT family and friends. Christianity proclaims the Law of Love supreme, after all.
Most viewers of Hallmark will not even notice, like the frog in the pot.
Jame Garner of Maverick fame said Hallmark was the gold standard of TV, then again he was a rabid Clinton supporter from Oklahoma.