You used to be able to stumble upon a mysterious mirror in your eccentric uncle's attic and we were all okay with it. No one's immersion was ruined because the protagonist got hit by a truck in chapter 1.
I keep bringing up the trend of isekai with the initiating event of 'one day, on the way to my normal school or work life, I fucking died, what a relief' and people keep telling me I'm overthinking things