Dude why is it so hard for you to grasp? Yes what you're saying is right, but it's not fucking relevant to this case because you still haven't been able to name one footballer who has done this.
Makes fuck all sense if other industries/sports are operating like that, it literally does not operate like that here in football.
You don't ask your most important player in his peak at 29 for a paycut. It'd make more sense to offer him a 3 year contract with same/increased wages and then lower his wages at the end of that contract when he's in his mid 30s.
I don't know how much clearer it has to be for you to understand that it's not standard practice in football at all lol