have a read mate:
https://ourworldindata.org/what-are-ppps
I know hat you a USA centric but the centre of the GDP world has moved eastward
consistently over the past 50 odd years & its still moving eastwards.
If you dont see the relevance of GDP (PPP) then that's Ok....we'll understand....eh?
PS: thank you for being civil.........at last that's a good sign !
