Well, it's more than a hypothesis, it's a goal. If it doesn't work, then it doesn't, but if it does, it's pretty high impact. (though not existential-risk avoidance high, in and of itself).

Finding a good match has made a big subjective difference for me, and there's a case it's made a big objective difference (but then again, I'd say that) and I had to move countries to find that person.

Yeah, maybe the original phrasing is too strong (blame the entrepreneur in pitch mode) but the 6th paragraph does say that it's an off-chance it can be made to work, though both a high improvement potential and a high difficulty in materialising it are not mutually exclusive.