Except no one minded when Texas Democrats made a habit of this, and would be outraged if Tennessee Republicans adopted the same approach.
I can't really blame people for supporting, say, a walkout to block a gerrymander or voter suppression laws, but doing it for other basic policy on a regular basis? You can't govern like that. This is basically a tyranny of the minority situation, where they are trying to exert power they aren't entitled to.
In Oregon's case, the voters themselves approved the amendment in an effort to stop this behavior. Granted, I have always thought this was a stupid fix and they should have directly addressed the quorum rule, but it is what it is and for now, Republicans really don't have a leg to stand on. They knew what the deal was. They over-played their hand on walkouts.