I think age is relevant here. Mostly for his recuperation after hard stage. Pog and Vinge can basically go every day, their recuperation is fantastic (alien yes, but age has something to do with it). Roglič can go one day, maybe two, but three in a row or at the end of a long GT? I don't think he can.
Roglič is an atypical athlete.
Some day he'll be past his best. It's inevitable. But, there's a lot going on under the surface which makes any snap judgement or analysis of his form based on a stage like yesterday's extremely
difficult. Even looking at this from a neutral standpoint, we've seen this rider crack way too many times over the past 5 years to definitively say 'this is it, he's now cooked'.
Quite a few examples have been thrown around (Vuelta 2020, Giro 2023, Paris-Nice etc.), i.e. another one is the Vuelta 2022. After winning stage 4 in Laguardia he seemed... fine. But he really wasn't & he cracked badly in the mountains. But even then his cracks were 'uneven', i.e. stage 6 he cracked, stage 8 he held Evenepoel's wheel, then stage 9 he cracked again.
Then on stage 14 he dropped Evenepoel & put big time into him, i.e. which made people think he could do the same on Sierra Nevada... but he didn't. He actually got dropped by Mas & 'only' put 15 seconds into Evenepoel at the end of the climb.
The only thing I'm quite certain of is when Roglič is not at 100% (for whatever reasons), his form fluctuates wildly & becomes sensitive to a lot of factors.
So clearly he wasn't at 100% in the Dauphiné.