To me, this kind of thing epitomizes the difference between liberals and conservatives. Though there are exceptions on both sides, broadly speaking liberals are for or against things based on underlying principles, while for conservatives it matters more who sponsored it and whether or not liberals are against it.
When Trump was in office, Democrats were more than happy to support any bill that aligned with the things they wanted to get done. Doesn't matter who sponsored it or if Trump was for it. But here we have yet another example of a bipartisan bill that has what Republicans wanted being shot down because it would be a point in Biden's favor, and would take away one of their arguments against him. No principles other than screw the liberals and make sure the other team doesn't get points on the board, regardless of whether or not it hurts the people.