Are all Isekai light novel's writing 'Bad'?

Sorry if this one sounds like a ragebait but i genuinely wanted to ask!

Is it true that the majority of Isekai Light Novel writing doesn't keep up to what's considered good writing in other written media?

I've heard and seen quite a lot about this but I'm not quite the one to talk because I'm not someone who actively reading it, if so, why do you think that is?

Edit: The question I should be asking is that: "Why are almost all isekai light novel are written like 'that'?" And why?