Obviously.That will not work. You don't understand how the process works, obviously.
So you'd rather smile, nod your head, and re-nominate a massive thorn in your side because (according to you) it is simply impossible to find a better candidate.If you are going to say she is obstructing the Biden agenda then that means you are pushing a candidate further to the left than her, and that isn't how the state of AZ works. Forget Biden and just focus on winning AZ. That's the goal. Understand the voters there. That may mean you get someone that won't vote with you 10-15 percent of the time, but the option is they won't vote with you at all. Shrink your thoughts down to what works in a specific place like AZ. Kelly and Sinema run as moderates much like McCain did for years as the maverick Republican. Go ahead and say you will do everything Biden wants and see how that goes with the general election.
BTW, Mark Kelly has backed filibuster reform, and has criticized Sinema for her obstructionism. That tends to undercut your position.
I do hope you don't use this same argumentative approach in the real world.There are just truths that you can call generalities but they just apply. You may not like them, but that just means you aren't living in the real world.
Manchin and Sinema are a pain in the ass, and Biden would have accomplished much more had they not been so intractable. Pragmatically, there's no way a different Democrat will win Manchin's seat.The most successful politicians are pragmatic. Clinton is a great example of this. He shifted gears when he got killed in the mid terms and had a successful 2 administrations. The party that embraces the pragmatic realities of what the voters want wins. 2020 and 2022 show the Dems did this better while too many Republican candidates were linked to election denial as they should have been because that's what they did. The public didn't want it, and they did fine in the primary and lost the general.
But that doesn't mean that a different Democrat couldn't win Sinema's seat.