It would’ve of course helped.
The fact that height and stereotypical beauty standards are not the only things that matter does not change that on average they have a significant positive impact.
Give women some credit. Confidence and fun are way better heuristics than a strong jawline on a neurotic wreck. They are smarter than men socially, on average, so any theory should account for that.
OPs friend got laid a lot despite "traditional" defects because of wholesome, fun confidence.
Put "I'm fun and confident" in your dating profile and I'll put "6'4"" and we'll see how that pans out. You won't be having much fun and your confidence will be shot.
A friend of mine, well below 6 feet, once had a dating profile where he went into a weird tangent about loving mac and cheese. A weird, sexual and hilarious tangent, where he started arguing with you, the reader, about why are we still talking about this? I said I never had sex with a bowl of mac and cheese! It was classic and he got a ton of dates from it.
Admittedly online dating sucks and my friend there could have been a comedy writer in another life. It's hard to stand out. But in person? It doesn't matter how many dates your profile did or didn't get, you must be fun and comfortable in your own skin, why spend time with someone who isn't both of those things?
Your goofy friend might get lots of updoots on reddit but if he's short and broke it would be <1% of women who don't immediately reject him. They will never even see his mac and cheese bio. Online dating would be a waste of time for him at best; at worst, kiss goodbye to this delusional confidence once the crushing reality manifests.
There's a point past this where racking up a number is hollow and meaningless but that's beside the point right now. The thing I'm trying to tell you is that you can have a better and more positive personality even if you can't grow 6 inches. And that better personality is not some incel shit or "negging" or whatever.
If none of this makes sense to you, look up Stavros Halkias on youtube and compare his looks to his general confidence and attitude.
Do you think Stav would be less popular with women if he was a 10/10 physically? Of course not. In fact, he wouldn't even need to be funny. He wouldn't need to be rich. He wouldn't need to be famous.
Maybe we're arguing different things here, I don't know what's going on. I mean many women will literally set a filter so that their apps don't even show them men under six-foot-whatever. These men are invisible. Yes, as the author proves, short kings can still get it. No shit. It's not a binary: 666 or permanent incel. I know you know this so I'm genuinely confused what you're trying to argue.