Frankly the 1-6h lifetime is very misleading.
If you play it on easy and only once then never touch it again, yes your first playthrough might be in the 2-4h range. If on the other hand you start directly in hard, then you'll have more than 6-8h of game time (again, first playthrough) which is around what a lot of $60 games used to have. And then you have the Daily challenges and you can play it again with vastly different loadouts that completely change the gameplay or alternate difficulty modes. And if you have a fleet and rush through the campaign after that first playthrough, then yes you can go through all the missions in less than an hour.
That would be like saying Starsector has a 4h lifetime because with one good early salvage and a pair of good exploration runs you get enough credits to buy an endgame fleet.
