“My controls” is something every single pilot has heard since day 1 of training and has a learned, immediate response to.
Making the assumption the PM could have taken control cleanly if the power dynamic was so poor that they weren't able to demand a go-around seems iffy, typical stabilised approach gates are 500ft in VMC, with an aircraft travelling 3nm a minute, 40 seconds before touchdown.
But as I said, the human factors involved will be a huge focus of the accident investigation.
If anything, it would have been yet one more opportunity to avert catastrophe and perform a go-around. Pilots are trained for this, and it makes less than zero sense for a PM to fail to take the controls from a PF who is flying unsafely over some imagined fear of a battle for control while the plane jostles around hurtling toward the ground. The PM is obligated to do this by every written regulation.
If you have never actually been behind the controls of an aircraft, please just stop trying to confidently assert things about this subject.
That's a lot of assumptions.
If this site had a slogan, I think you just guessed it