The base may not care but you need more than just the base voter to won elections. So what do the non base voter think is more important.
Trump has been quietly losing white evangelicals. The bible photo op shit was him freaking out over it...and that didn't help him.

Trump’s Approval Slips Where He Can’t Afford to Lose It: Among Evangelicals (Published 2020)
Polls and private concerns from top social conservatives show the president’s standing with the cornerstone of his base isn’t what it used to be. A photo op with the Bible was supposed to help fix that.