Most Real Madrid presidents of the past 15 years would have wiped Marca from the earth if they could. They really drive their own agenda and since they are the top selling Spanish newspaper, Madrid presidents find themselves forced to go with the flow.
Fan owned clubs, - and that includes us and Athletic too - have become hugely political throughout the years. Marca is a powerful opinion-maker. The beast needs to be appeased, they already forced one president (Calderón) out.
Pérez is obsessed with his legacy and popularity in particular - it is well known that he orders incessant opinion polls on signings, managerial appointments, etc... so he's pretty malleable in that regard.