Why does winning a title matter? The only way to answer that is to provide an explanation of what it means to win a title. That's inherently subjective.
Because that's the goal of the sport: a championship. Do you run a race for the experience or do you run the race to win it?
That's a really interesting analogy to bring up, actually.
I'm a runner. I love running. I enjoy participating in half marathons, marathons, etc. I've never once won any of those races I've participated in. Often, though, I get a personal best or I come in ahead of some people I was chasing during the race. Other times, I don't manage those things but it's a tough course and I feel like I do a good job. Still other times, I just have a really good time and feel great afterward because I did an athletic endeavor, I ran on an unusual or particularly beautiful course, I got to run with a large group of people participating in a race together, and I expended all of my energy. That alone can leave me feeling accomplished at the end.
So no, I don't think "winning the race" is all there is to it.
By your logic, if you offered to give me amnesia during the race that would cause me to run very fast and win, I should be happy to take the deal. I should wake up after the race is over, with the trophy in my hands, and feel amazing.
But I would never accept that offer. Winning doesn't have any real meaning in and of itself unless you're a person who just gets off on the idea that you've come in ahead of somebody else. To me, what gives winning significance is the road you take to get there.
So yes, not all victories are equal. Some mean more than others. There's no way around that, and I think it's completely nonsensical to suggest otherwise.
But you're allowed to value whatever you like as a fan.