I play nine and use 6 controllers
I think this is where the difference of opinion comes in. Either some of these people just play single player games and once they're done get rid of them. I do that with single player games as well, but I also have the GaaS titles which are chunky, which basically reduces the footprint to a sliding window for new games. It's not that you religiously play these titles for hours, but games like Destiny, RDR:O, Division 2 and GT:S all have daily workouts, challenges, engrams and season passes to grind for and it's not feasible to uninstall and reinstall every few days at these sizes (especially if you're all digital). Then you have games like Odyssey or SotTR where you want the season DLC but it's roadmapped to drop quarterly so you need to keep the game handy.
Both consoles have dropped the ball in terms of capacity but gone for performance. It's a tradeoff but ti does have an overhead an impact on us. I dunno why so many peple enjoy pretending their stupid and make out like these sizes are massive and we're being unreasonable. 500GB SKU's were considered to small last gen and quickly superseded by the 1TB SKUs. Now we've move forward and backward. It is what it is though.