Your first paragraph - my reply (once again). You don't have a clue either. At least I am honest enough to lay it all out and say so.
'...As for touring the EU, I don't know the numbers of bands/musicians who tour the EU every year, so I cannot make any kind of comparison with those who don't. I suspect in normal times there is a far greater number of pro/semi-pro players who play solely in the UK than those who tour the EU, but as I say, I do not have the numbers so I can only guess, rather than post a fully-informed point...'