Long answer but I think it's pretty clear why once you think about it.
25+ years of Fox News and right wing AM radio has turned modern day conservatism in America into a contest of who can act like the biggest parody level re and trigger the libs. This started way before Trump and it's going to keep happening after Trump's fatass is dead. It's not about governance anymore for the GOP. For awhile it was about at least pretending to be interested in governing so the GOP could hold onto suburban voters, now it's a literal contest of who can demonstrate the strongest disinterest in governing.
And that's why Republicans can't just admit they think Herschel Walker is a severely flawed and troubled person who they're holding their nose and voting for just because he's an R - because it wouldn't be true.
Herschel being a parody level hypocrite who talks about black men needing to be better fathers while he's a deadbeat dad who pays for his girlfriends to get abortions, makes up about working in law enforcement when all he has is an honorary badge that 8 year olds get going on a field trip to the police station, etc. is precisely what people like Chris, Derptacular, Millenniall_Messiah, Dirk's Finale, etc. like about Herschel Walker. That's why they don't just admit they're voting for him despite all of his flaws - it's because they don't view those things as flaws. They view those things as characteristics that make Herschel a real conservative patriot.
It's the same reason why candidates like Herschel, JR Majewski, Doug Mastriano, Kari Lake, etc. win primaries by saying the most insanely re ed imaginable. It's what conservatives want now.