I think this part right here was so important to Yuuri’s development. Like the whole world, at this point, knows that Yuuri wants to hold on to Victor, prays to god for more time with him, etc. Ever since the Onsen on Ice challenge, losing Victor has been Yuuri’s greatest fear.
But I don’t think it is anymore. Last episode has shown that Yuuri is willing to fight for Victor because he realizes that he’s worthy of being Victor’s student, that he’s good enough for Victor.
A part of Yuuri is still doubting himself, which can’t be helped, but deep down he knows that these fears are baseless. He’s strong enough now to open up and trust that Victor won’t abandon him, and all he really needs is for Victor to simply be there (preferably silently).
Maybe bringing up these fears and having Victor confirm what Yuuri already knows (that Victor’s not leaving or giving up on him) was exactly the cathartic release that Yuuri needed. So once again, Victor somehow bumbles his way into a being a decent coach (after he makes an empty threat that he immediately regrets lol)