Sure, from the outsider's perspective it is. From his perspective there's no guarantee, and his actions should reflect as such.
This episode they've cleared up his intentions. It seems that he will just let his body get used to his quirk rather than train specifically to achieve this more quickly. His choice then. Interestingly for him to place a pile driver into his shoes.
I applaud his resolve to not use 100% One For All ever again until he's ready. Thank fuck.