All of that stuff matters when you're using the backup for its intended purpose: to restore a system after hardware failure.
Unix tar is obviously not the right solution, but a Windows tar seems like it shouldn't be that hard to do and yet we are in the situation we are today. I've been using dump/restore for decades now on Unix, including to actually recover from loss, but I admit that it's not that pleasant to use. I like that it is very simple and reliable however, unlike the mess that is Time Machine (recovering from a hardware loss on a Mac is a roll of the dice, and I've gotten snakes) or worse Deja Dup. I'm not sure I've ever successfully recovered a system from a Deja Dup backup.