It was "just one game" if we ignore the pre-season too. Again, my issue isn't really based on the amount of shots he made or anything like that. I'm more than willing to chuck that up to rustiness. It's about what seems to be his at ude on the court over the last game and the pre-season games. You don't turn into a largely self-centered guy because you're out of practice. Could his at ude have been a response to his rustiness (like he wasn't hitting shots so he started forcing them)? Maybe. But he came into the game doing that, so it certainly wasn't the sole cause.
I don't disagree with this in premise, but the "balance" isn't static -- the ratio that made sense last year won't be the same as what makes sense this year. He should have more things he's good at by this point. You brought up the hypothetical about him being a deadly PnR partner with Paul. But he's not like that, with Paul or anyone. There's a difference between a guy like Reed Sheppard saying he doesn't just want to be a shooter and a guy like Amen Thompson saying that. You can get the fundamentals then choose to not use them all the time. You can't not learn them then choose to start doing them. Wemby playing within the team concept isn't some sacrifice he's making for the team's benefit. It's essential to his individual development to be able to play his position at an NBA level. His shot quality also goes down when he freelances. With nothing solid to fall back on, his experimentation doesn't really have anything to measure it against.
Nobody cares that Victor wants to win a le. EVERY player wants to win that. He's not special in that regard at all. But when he's sitting there pouting in press conferences because his team is on a losing streak, it undercuts the idea that he's willing to sacrifice short-term wins in pursuit of a le. This is accepting the assumption that that relationship is sound and that the Victor playing winning ball now impedes future success. That's not really true -- while not incredibly linear, player development isn't so stochastic as to be a mess that all of the sudden comes together. Players can and do build their games up in noticeable benchmarks. Wemby's not going to spend years floating around on the perimeter and then just suddenly understand the nuances to screening, moving and timing. Believing that is just insulting to players who perfected those elements over long successful careers. He needs to practice those things to do them well, and right now there's not a ton of evidence that he's doing it.
But even accepting that assumption -- I don't think Victor is as comfortable losing as you suggest he is. I think he wants his team to win every game. When he does his "call for the ball when he's not open" shtick, it's because he believes that's best for the team. I hope that's just because he's young, eager and confident rather than him internalizing the assumption that his teammates have been letting him down and they can't win without him controlling everything. Whether being a center is his main future or just a hat he needs to wear from time to time, he'll need to understand that the position requires that he read and react rather than try to initiate touches. If he wants to compartmentalize it to where he's Durant sometimes and Chandler other times, that's whatever. What matters is that when he's in Chandler mode that he needs to embody that role because the offense can't work if he doesn't.
"He knows who he is and he knows who he should become" isn't profound if "who he is" is "the main character on the court" and "who he should become" is "best player in NBA history". Maybe the 20-year-old doesn't have some psychic understanding of how he's going to develop and what the pathway will look like. I feel like most of us didn't know at 20 what we'd become. I'm perfectly willing to wait to see what happens. But yes, I'm feeling a bit apprehensive that his conviction on how he needs to play could end up hindering his growth more than he believes it will.