People who self insertthemselves in certain characters

There is a question that I wanna ask.

I hope that i don't sound rude but since i have not experienced it I might offend some people. So for that i would like to apologize in advance.

I see a lot of people self inserting themselves in a story mostly as the mc but I have never found it thrilling or exciting. I have never thought myself as that person so I don't really get why people self insertthemselves in a certain character. There are also many isekai animes ( i don't really read that many isekai mangas) where the mc is just supposed to be a self insertfor some people.

There are also some people that get upset when the main character doesn't appeal to themselves but i don't really get why people act that way.



I am sorry if what i said doesn't make any sense