I just genuinely don’t know if writers thought that they should be getting more. And if so, why?

What do you mean by “more”, and relative to what? The main complaint from writers are that in recent years the trend has been them all getting paid significantly less. Not just a few percentage points, more like 1-10% of what they used to get.

So, they want to get paid the same as they used to, which is more than currently but not “more” when looked at from a longer time frame.