Blue light does not disrupt sleep.
They've debunked the blue light thing recently. It's not disruptive to sleep.
It doesn't really matter to me as long as my mattress is comfortable, I sleep just fine.
Totally agree with you. Probably it depends on the quality of the sleep first of all. I'm bipolar so sometimes it's very hard to sleep. I solved this by buying a couch and a high-quality mattress. It's easy to find them. I recommend to you Amazon or sites like this