When the hell did I say that it couldn't? I literally told you the following:
If the games were actually good, it’d be worth debating.
Careful now, your mom might take your computer away knowing that you insult people online.
If those games are any good, yes, if they aren't, no, which has been my point all along. The Series X/S had better launches than the Xbox One and Xbox 360 despite facing far stronger competition from the PC platform. The fact that it did better than them despite having no exclusives to speak of completely shuts down your point of them declining because of PC ports. They were doing better against a Steam with 130M users in 2021 than a Steam with 15M users in 2008. Surely, if PC ports were such a problem for Xbox, then the 130M users should have swallowed the Xbox brand whole, not make it sell better. The numbers don't match your claims.
You said that like 3 times. Just leave already.
Microsoft themselves said there were shortages and it was for all consoles. There were multiple reports. The Series S was much easier to find but still regularly ran out of stock.
And I never said exclusives don't help, they do. What I'm arguing is that bad exclusives don't move the needle at all. If Xbox had a bunch of games that routinely scored 90+ on Metacritic and received much fanfare but still failed to move units, then PC hurting their console business would be a legitimate question. They release a bunch of shit games for years but also port them to PC. In this case, keeping them exclusive to Xbox would have made no difference whatsoever because people don't care about bad games, exclusives or not. I can guarantee you, PlayStation would also flop if they released mediocre games for over 10 years straight, even if they kept them exclusive.
I'm in this very thread claiming over and over again that day 1 exclusives to PC would hurt the PlayStation brand, but that's because their games are actually worth buying and DO convince people to invest in a console to play them. God of War, Horizon, Uncharted, Ghost of Tsushima, The Last of Us, etc. These games will compel people to buy your consoles, but if you port them to PC at launch, this will encourage customers to ignore your consoles in favor of PC. Ryse, Quantum Break, Crackdown 3, Gears 43, Halo Infinite, etc, won't convince anyone to buy your console because they mostly suck and people don't buy bad games just because they're unavailable elsewhere.