Exactly. And that's what football fandom is about, especially when it's your local club. On that day, it didn't matter that Grimsby has been in decline for decades, that everyone think's it smells of fish and that the M180 is like some weird resonance strip from the Twilight Zone. All that mattered was that the team was back in the football league, to battle it out with twenty three other teams with fuck all money and no facilities. It's also tribalism, even moreso when your talking about clubs from areas that have a strong social identity, like Scousers, Mancunians, Geordies, Brummies etc.
I'm a Newcastle fan and their ups and downs effect me far more than any stupid, fairly meaningless game should but my fandom will never be on the level of someone who was born and grew up in Newcastle, surrounded by the Geordie culture and who sees the club as a part of what their local cultural identity is. Where I'm from, we don't have that, I live in Staffordshire but I'm absolutely miles away and have nothing in common with Stoke, I'm too far away from Birmingham to be a Brummie, too far from Wolverhampton to be a Yam Yam and Walsall is too small to be anything other than Jeremy Kyle guests and Robert Plant, so I'm sort of stuck in the wilderness, coaching ten kids of a weekend, seven of which support Barcelona.