As Paul Krugman points out, the three principal components of the Biden bills, taken as a whole, are climate change mitigation, infrastructure, and funding for children. All three components involve investments that should pay off handsomely in terms of social health and economic well-being in the future. None of them, however, is focused primarily on the here and now.
You can certainly make a strong argument that investing money for the future is a welcome change from past practice. The problem with children, however, is that they do not have a vote. Coal miners, on the other hand, do. If you are looking for an explanation as to why the BBB may not pass, you could do a lot worse.