I'll try and explain the difference between a feature and a benefit again...
Here's your statement using feature and benefit wording.
"We have the best trained and most experienced judges making decisions that affect all our lives"
(That is a feature, definitely not a benefit)
"which means when people go to the highest courts in the land to get fair treatment, those judges will apply the law as just fairly as they used to before we left the EU, with the added confidence they won't be overridden by a higher court that sometimes has a different view on things and may sometimes dispute their decision."
(This would be a benefit to the powers-that-be who used to get infuriated when their power wasn't always translated into the action they wanted because the overriding court had a different view. Not the EU court, usually, but the European Court of Human Rights, a body we will still be involved with once we've left the EU - unless we leave that too.)
How can it not be a benefit to have an external check and balance on some aspects of law using people who are not appointed by the UK body politic and cannot be influenced by it - even if it's unconsciously so? Depends on the sort of laws you're trying to pass and enforce, I guess.
I suspect that if one is patriotic and proud of one's country it is second nature to call self governance a benefit.
