He is not going to ride two gt every year. Next year tour and vuelta, and then going back to just the tour. It wil prolong his career and for his legacy the number of Tdf victories will outshine the number of the other two gt.
He wants Msr, he will want Roubaix, Flanders again, worlds, Olympics,…
Not for the monuments record, I genuinely believe he is more motivated by the challenge they each represent, the history, the uniqueness.
Or if vingegaard comes back with a bang and takes his Tdf title, I would expect Pog to strike back even better