This is missing enormous amounts of context.
JBE came in before Trump made it a sin to vote Democrat in Louisiana and after Jindall (2 term republican) did such a horrific job that the GOP couldn’t recover no matter who they ran. He also faced possibly one of the worst candidates in history in Rispone for his second term. He was one of the last blue dog democrats, had decades of great reputation built up, and had no problem being extremely cozy with oil/gas. He walked a very thin line super confidently and basically was a 1990 Democrat. It didn’t hurt that he basically saw him nothing but success during both of his tenures. He was an incredibly capable governor.
Frankly he’s an anomaly. They won’t have Democrat Governor for decades just like WV won’t have a democrat senator again for a long time since Manchin left.
Keep in mind Louisiana has had a Republican legislature for literally decades now, a super majority years-running currently. The current state is the result of Republican policies and it’s a red fortress for the foreseeable future, especially with the changes they made to primaries and voting, coupled with the recent SCOTUS ruling on gerrymandering. No matter what happens in the coming midterms, I guarantee you the legislature will remain a super major majority for the Republicans. It is a cartel state now where they literally remove positions when Democrats win, as New Orleans learned with their court clerk who was recently elected.
Louisiana is THE Republican state and offers too few electoral votes for the Democrats to pay attention to it. And every year they stay away from it the deeper entrenched Republicans become as they pass more and more laws of favoring their ability to keep their seats. The current legal landscape is so dire it’s an understatement to call it an uphill battle for non-republicans.