I think the majority of welsh people are more passionate about rugby. We are crap at football let's face it. If your watching the footy game in a pub you can see the landlords point business is business in these situations and he has to cater for the demand. I would go ape if the same arose with rugby but it doesn't thankfully.
Care about the odd international game of Rugby yes but I wouldn't say they're anywhere near as passionate about rugby than footy, in South Wales maybe, but is there even any professional Rugby clubs in North Wales?
Llandudno Rugby Club play in a field for example, watched by 20 odd people each week! There are much more people in the pubs watching Man United v Liverpool than there are watching Wales play Rugby I think.
The difference is it's the English "fans" who really don't give a doggy doos about watching England play rugby so pubs are safe to show Wales games without losing customers (and obviously from a business point a view, they pay their money and take their choice) So am not having a go at the landlords.
It just puzzles me why it happens that's all. And yes I do think it's annoying, just as someone in say Sheffield would be annoyed if his local was showing Wales v Azerbaijan instead of England v Italy!!