Here's the thing -- the electors' votes for the 2020 election were already cast and counted. Whether those states decertify electors who already voted won't change a thing. It would be like a member of Congress changing their mind on a legislative vote after the law was already passed by Congress and signed by the President. They can certainly change their mind, and declare their own vote to be "invalid", but it doesn't change anything that already happened.
In terms of changing public opinion, most people have (quite rightly) concluded that this is a highly politicized debate. They'll just assume that any purported decertification of electors is just a product of Republicans getting more control in a few particular legislatures, and not draw any particular meaning from it.
You can scream to the heavens that they should, but they won't. That's just reality at this point.
decertfing a presidential election is in the constitution, go argue with the founders.