In the interview he basically said::
"
I needed to go, my teammates were empty so i had to do something.
I put in a strong attack and a few other strong people could follow. I had a bad moment on the hardest part of the climb, where i shoud have been able to add another cartouch but i coudn't do that now.
Normally i can do 2-3 big accelerations, now that isn't the case. Probably some after effects of Covid. But nothing is lost, i"m still 2nd and i'm looking forward to tomorrow.
"
I think he has some freedom here because its not a race he lived/trained/suffered for. Its basicaly he stage race he could start without pressure

. (Like has been demonstrated by us the fans

)
Imagine if he started the tour with this form and tried to go for a stage win and dropped like a brick because of it.
edit: from his interview, if his team would have been stronger he would have had the ability to wait longer

. So give him a Sep Kuss/Vine/... as last person and he can sit in the wheel until the end