It is important. Given how much time you spend sleeping and people complain about spending $1000. But they don’t complain about a $30000 car they spend less than half the time in.
The same or very similar mattresses are rebranded and resold as vastly different price points. Mattress sales is mostly marketing. When I was researching mattresses years ago the takeaway was basically price and satisfaction/quality of sleep are not correlated very much.
