This phrase appears multiple times. Wherever it appears, they are wrong. So I love this set of pages. It tells me these are not people to be trusted. They have deep, fundamental misunderstandings of the things they "cannot" provide.
Sometimes, they are mistaking the practical (and useful) for the theoretically perfect. They don't do X because it isn't theoretically perfect, and they can't seem to imagine a way to do it other than the strawman trivial (and bad) way they set up for a smackdown.
Sometimes, they are confusing different issues. Like in this case, what encryption at rest even is, and what it achieves. Or how they seemingly misunderstand ASPs.
I think they are actually probably reasonable tech-wise, and the presentation just needs some help (or some topics not discussed at all). It feels like a Swiss caricature though -- we are always right, if you disagree go away. We only want competent customers. (Where competent == agree that we are correct.) Spoken with a calm air of superiority of course. But maybe what comes off as user hostile to my sensibilities is perfectly cordial to a Swiss person. It would be ok if they weren't actually wrong on the security topics.
I especially enjoy:
No feature parity
We really do not care what service X offers and will not try to match them