I think the one issue that people are going to have with your argument is that we saw the same thing last year with guys like Jack Hughes, where his underlying numbers were ridiculously good and everyone kept waiting and waiting for the points to supplement those underlying numbers and they just never came. Now, we are seeing the same thing so far this year with Hischier. His underlying numbers are great, but the points aren't coming. They didn't come last year for Hughes, so why would they come this year for Hischier, is I think what a lot of people are getting at. Like you said, in all likelihood, points should come, but we have already experienced players where the points just don't come even with the underlying numbers looking great, so for a lot of people, it's tough to hold confidence in these underlying numbers when more often then not for us, they don't translate to points, for whatever reason that may be even though it shouldn't necessarily be the case.
I would also like to add one thing to this point. Hughes, at least through the eye test, looked fantastic while putting up those crazy underlying numbers. I think we can both agree that Hischier does not look nearly as good as Hughes did last year while putting up these numbers. At least with Hughes, you could see him before your eyes playing great and that great play just not translating. I personally am not getting those same vibes from Hischier. Like Lindy Ruff said earlier in the year, he will always look at the advanced stats in a meaningful way unless your play on the ice isn't backing it up (I believe this was in regards to good advanced stats for Bratt and Sharangovich for a game they both played terribly during). For Hughes, the advanced stats last year backed up what we were all witnessing on the ice. For Hischier, I am just not seeing the same level of play that will be capable of sustaining this high level of offense generation.
I agree with your point that in all likelihood, Nico should start producing more points with the numbers he has and probably should have had more points over the past 7 games given his great numbers. But, through the eye test, it's tough to tell whether he can maintain it, and even if he does maintain it, we have seen players, like Jack Hughes last year, maintain great numbers only to amount to not a whole lot of points.