As far as I’m aware, psychology isn’t considered a ‘facilitating subject’ by RG unis, if that is a relevant consideration.
That document has been selectively quoted and completely misunderstood so often that it's become unhelpful.
All a facilitating subject is is one that's required by a variety of courses available at RG universities. In other words, they're subjects that keep your options open. It does not, however, mean that other subjects are in any way blacklisted, liked less, or are in any way unsuitable (they may be unsuitable for a specific course, but that's separate to their inclusion or otherwise on the facilitating subjects document). In some cases, a subject that's not on the facilitating subjects list will be required for certain subjects - but it's not listed as being a facilitating subject because only a small number of courses require it.
If you have a DC with absolutely no idea what they want to do in future, and who wants to keep their options open, by all means take the whole facilitating subjects list into consideration. But don't pay too much attention to it...
From the booklet itself
"If you don’t yet know what you’ll want to study at university, there are
some subjects which will keep your degree options open until you decide which course to take. This guide will help you to see which advanced level subjects — which we call ‘facilitating subjects’ — open doors to more degrees and more professions than others. It’s not about ‘hard’ or ‘soft’ subjects, but those which keep your options open."
www.russellgroup.ac.uk/media/5272/informedchoices-print.pdf