More simply, if they wanted to support PC and were not concerned about lowering console demand the games would be there day 1 to maximize return. Period. There is no rational talking points surrounding that. The only valid reason to withhold the PC release is to encourage console sales, they literally have said as much themselves. You even undermined your own argument by saying they would "risk losing some console sales" to create a bigger audience for the GaaS games, which is the very point being discussed.
You can keep repeating the same false statement but it's not going to make it true. They supported PC when they decided to release games on the platform and there's no rule that it has to be day one. Their commitment to releasing their games on the platform.
And no, it doesn't undermine my argument because there are two mere facts that you cannot ignore.
1. No reasonable person within Sony thinks a lot of gamers would buy a PlayStation console.
2. Releasing gamers on PC also discourages gamers from buying a PlayStation because they'll wait for the PC release.
They know the vast majority of their argument on PC would prefer to wait and that's who they're selling to.
MS made the choice to release everything day one which will always lower console demand for them, it's a gamble they took because it helped cover development costs for first party games but the associated negatives were known to them. Consoles for MS are an option for players that don't have a gaming PC or just want the console experience for whatever reason, it isn't the linchpin of their strategy and hasn't been for quite a while. Consoles are probably the most profitable part of their ecosystem thanks to the store and the subscriptions, and will remain important but not to the same degree as PS is for Sony.
Microsoft is third in the console race and saw no growth and that's why they needed to expand outside of console.
Do you realize that Xbox Series consoles are on a similar pace to Xbox One, right? This alone proves it doesn't dramatically change sales and Microsoft only expected a small minority of gamers to leave Xbox for PC.
Your arguments fall flat with basic logic. You think the risk of losing console sales means they not supporting it and that's simply a really bad argument to make.
They can save console sales and support PC by releasing games later on the PC platform.
You're really trying to say they're not trying to support PC even though they're rumored to make their own launcher. This is what you call support. No amount of spinning will prove differently.