I do think that as he improves as a scorer, he'll get better passing opportunities. That's actually normal. Nothing about what he's done in seven games has "proven" anything. An issue that you're having is that you're looking at him like a PG, where he's supposed to be assisting as his primary function. Usually for them, they have assists numbers that don't track with their scoring. But scoring wings develop passing as a way to take advantage of their extra attention. You can see that for someone like Kawhi, whose assist (including rate stats and counting stats) went up as his scoring went up. DeRozan showed the same trajectory. Lonnie ALREADY averages more assists per possession than either of those guys did at his age.
https://stathead.com/basketball/pcm_...p2yrfrom=2013; https://stathead.com/basketball/pcm_...&p2yrfrom=2015
So no, Walker's not "who he is" just because toward the end of his fourth year in the league he's going through a stretch of games where he's calling his own number more than ever before.
https://www.nba.com/stats/players/pa...TIAL_AST&dir=1
https://www.nba.com/stats/players/pa...TIAL_AST&dir=1
If anything, Walker's passed the ball more over this stretch and has averaged more attempted assists (meaning shots that would have given him an assists if his teammates didn't miss) than he has done over the year in aggregate. So he's shooting more, setting his teammates more and even on the whole is already better at assisting than eventual star wings were at his age. It's just not going to fly to argue Lonnie scoring like a first-option on great efficiency is something the Spurs should be trying to curtail.
Pop doesn't develop wings like that. I'm not going to argue he hasn't tried to see if Walker could play PG. He's done that with multiple players, Primo being an obvious example. People might even remember that he ran Danny Green at point on for multiple games. That Walker wasn't ready to be a PG early in his career (dude just learned to dribble at an NBA level in the 2020 off-season) doesn't mean Pop think Lonnie is a score-only player. It damn sure doesn't mean that Lonnie scoring great while being assertive somehow is running against the team's developmental wishes. Lonnie's closer to Vassell in age than he is to Murray. I don't think it's a defensible position to say, "He is what he is," in the middle of a conversation about how different he has been recently.