Have you never had a non-technical person ask you to help because their PC is slow? Non-technical people care, they just don't know how much better it could be for them. They understand that their PCs are slow, and they understand how to close apps they aren't using to stop the computer slowing down. This habit even transferred over to phones where developers had to teach people that it's not necessary to habitually swipe background apps closed any more, because they were so used to doing it.