IMO, they used the Humanities Year to artificially create the alleged "overcrowding problem" to justify something they wanted to build for ulterior motives, and then speculating about what those motives may have been, since by itself even the engineered problem could have been solved very easily without the absurd expenditure. Problem -> Reaction -> Solution. Create a problem by adding Humanities Year (instead of solving for it before you added it by adding a wing or building). Elicit a Reaction ... where the lay faithful are sympathetic to pictures of two seminarians sharing one of those tiny rooms. Solution ... propose the building project and get the lay faithful to send money.
You're off base here, and I disagree with you. I hesitate to say, "Earth to Ladislaus, come back down please." but I'm tempted to. The main thing holding me back is my lack of belief in "outer space".

But pop culture, old habits, and common speech still rattle around in my brain...
Bishop Williamson is not enclosed in (((parentheses))), and he wasn't part of any "problem-reaction-solution" cօռspιʀαcιҽs. He was one of the good guys, remember? His last name was WilliamSON not WilliamSTEIN.
This really should go without saying. I can't believe what I'm reading, or that I have to write this response. I mean, "hello, McFly?" You do remember +W got kicked out of the SSPX and died in exile, right?
Bishop Williamson, and no one else, started the Humanities year. He had NOTHING to do with the eventual neo-SSPX embracing of branding agencies, compromise, change, and contradictions. Including the purchase of the Disneyland seminary near the corridors of power (close to Washington DC).The institution of the Humanities year, and the neo-SSPX aberrations, have NOTHING to do with each other. There is ZERO cause-effect relationship between them.
Some people make associations that shouldn't be made -- those people are called schizo, if I'm not mistaken. At least if this meme is to be believed. (I'm not calling Ladislaus a schizo or trying to pick a fight with him; hopefully he can take some disagreement here and there)
How about instead of schizo, we say it's a "post hoc ergo propter hoc" fallacy.