Trafford is 20 minutes walk from the centre of Manchester. Bolton (or Horwich as it now) will take you a couple of hours. Also Trafford has been Manchester for as long as the club has been there (and it was Manchester when it was Newton Heath).
Whether you support City or United has been a cultural thing going back 100 years. It kind of defines you and where you fit in. I know some people that have had season passes for City for 50+ years, passed down from father to son. It is totally part of their identity.
> That’s not even remotely geographically correct.
Which bit is wrong? Old Trafford is in Trafford which is in Manchester. Bolton is in Greater Manchester which, ok, isn't what people would possibly understand by "Manchester" but it's still viable.