And notice how every PC that is pre-built for you, and every oil change done at a shop costs a more than doing it yourself.
Only a small number of PS5 gamers will end up disassembling the console and screwing in a compatible PC SSD. I bet most PS5 users will just plug in an external HDD like on Xbox and PS4 and think it does the same thing.
500GB is $300 per TB
2TB is $115 per TB
3TB is $150 per TB
So the 500GB version is terrible value compared to the others. Personally I'd go with the 2TB version at that price but I'll be holding out until 2022 anyway so if prices have dropped enough by then I'll go with a 3TB.