you are correct. can't expect unifi fanboys to pass a reading comprehension test.
for the record, most other industry that offer APs that run on standalone will work with all features, or only advertise that feature on the package. For example, you don't see cisco(?) unleashed mode APs advertising guest portal, unless they can do it on unleashed (stand alone) mode.
Don't worry about that; even the biggest unifi fanboy will turn back into normalcy once they will have to contact the ubiquiti support (yeah, ubiquiti support, that's oxymoron).
for the record, most other industry that offer APs that run on standalone will work with all features, or only advertise that feature on the package. For example, you don't see cisco(?) unleashed mode APs advertising guest portal, unless they can do it on unleashed (stand alone) mode.
Unifi is intentionally misleading.