I don't think that's what is being claimed to be the issue there. More that the minority party will often resist, challenge, filibuster legislation, even if it is for the good of the country, for no other reason than "we are the opposition". There are many things that might be objected to on philosophical grounds, but during Obama's term, McConnell literally was quoted as saying his goal was for Obama to be unable to pass any legislation, regardless of the good it would do.