Every product should include this kind of disclaimer. Clarity on what it's NOT is often more immediately illuminating than (usually more verbose) descriptions of what it IS.
Anyway, this looks like it could be useful - though I'd find it much more compelling if it were OSS.
Aside from the enterprise stuff like consistent metrics I’m not convinced semantic layers improve agent performance. Case in point is Snowflake Analyst has been routing 90%+ of queries to traditional SQL as opposed to their own semantic SQL dialect.
A semantic layer is a concept from 2018 in the BI world. Metadata is one thing but semantic layer implies an abstraction from physical data with lossy translations.
Lots of 404s on the docs pages - might be worth an audit of links?
You could make an even more helpful comment by explaining what would make the landing page better, but at a minimum, please avoid pejoratives and putdowns.