There is such a thing as a champion racing for too long once he's past it. Think back to when Lance Armstrong rode around in the gruppetto in 2010. Actually, even that wasn't as bad as Froome is now because he did finish 22nd overall at 38 minutes from the winner, i.e. something I doubt Froome will be anywhere close to "achieving" in 2021.
"Just being here" has nothing to do with being an accomplishment when there are loads of other guys who can do the same job (i.e. basically finish in the middle of the GC in total anonymity).
And those goalposts with Froome sure have shifted since last year, haven't they? i.e. we've gone from "my healing is almost complete" (& the drama when he wasn't selected by Ineos for last year's Tour, remember?) to now where he's supposed to get a merit medal of sorts for merely showing up at the race.