The GOP thinks that hammering on certain social issues is politically advantageous.
They may be right.
Grievance politics has worked in the past for the POT. It's what got the Orange Messiah elected.
Grievance politics is not what got Obama elected. George W. Bush is what got Obama elected. The guy who lied the country into two wars neither one of which is completely finished, and who crashed not only the American economy, almost took down the world economy down with it.
The economy was shedding on average 500,000 jobs per month when Obama was inaugurated. Americans were broke, and unemployed, and Republicans wanted to cut the lazy bums off unemployment benefits.
Almost the exact same reasons they why they elected Joe Biden. Except Trump also killed 500,000 in his pandemic, and only 18,000 died from H1N1, over an 18 month span in that pandemic.