I have a "soft spot" for a big four club and have seen them win things live ( FA Cup & 1st Division ). but even then it was not as good as seeing promotion from Division 4 with City.
And to be honest I get more out of the last game of the season fancy dress outings.
When I tell my son about the days out we had the experience is better than anything else I've been involved with - the camaraderie of being a city fan in a group of city fans from the city itself and the surrounding valleys gives you a sense of "belonging" that nothing else does.
I guess it goes back to tribalism - but I'm much prefer to be in my tribe than try and infiltrate someone else's where I know I'd never really belong
Part of being a city fan is the lows as well as the highs - they would never get this.