The clubs don't hold all the cards though. You say they don't need the PL but the PL needs them, this isn't true. The PL would be substantially weaker without them clearly but they'd survive, football would continue for the rest of the teams, if the founding 6 don't have the PL though they have nothing, a club can't exist without a domestic league to compete in. sure they can attempt to create a super league between themselves in its void but that's not sustainable for anybody.
The PL and the FA (and the Spanish and Italian equivalent) actually hold the aces here they just have to be bold enough to stick to their threats with regards to expelling clubs from the league and call their bluff.
You can actually see a world where the American owned clubs might still want to push through with it and risk expulsion but they'll be at least one that buckles and many others will quickly follow. especially so when fan pressure starts, and covid or not you can be sure they'll be literal riots outside all 12 stadiums if that became a genuine possibility.
If the PL, FA, UEFA and everyone else involved in that statement stick to what they say and the super league group stick to their proposal, there's only one winner here and City aren't on the right side of it