I’ve never personally understood why people get so obsessed with which works of fiction are more real. It’s just a silly thing to worry about.

It adds to the cohesive narrative which can make the overall story telling experience better. When works are considered canon, that’s usually an indicator that the overall franchise narrative is being cared for and thought of.

It can also mean that some aspects of one show can show up in another or vice versa. It’s very cool to see a character you really like. Show up in another medium.

I fully agree, but I also think that there's too much focus these days on official canon. Copyright might mean that only one big giant corporation is allowed to make stories "set" in a particular universe, but that shouldn't mean that fans can't decide for themselves "nope, that was lame, I reject that particular bit." And if enough fans share that opinion the big giant corporation might want to listen to them.