I'm not sure some people understand the concept of devolution as opposed to independence. Devolved government can always be over turned by the state just as a local council decision can be over ruled.

That said I think it was the wrong tactic they should simply not recognise this law outside of Scotland.

One more point

What if it’s a Scot in England though or a Brit in Scotland.
If this was allowed it would have been legal all over the uk for the above reason.
That’s how I read it.

What is the definition of a Scot? Presumably someone who is entitled to vote in a Scottish election or referendum.

Can you imagine the legal and social issues if thousands of people
start claiming gender change recognition in the UK because they have a piece of paper from Scotland.

Responsibility Deficit Disorder is a medical condition. Symptoms include inability to be corrected when wrong, false sense of superiority, desire to share personal info no else cares about, general hubris. It's a medical issue rather than pure arrogance.