The game isn't finite, there's plenty of things to do (all of which require the tracking to actually work) Theres only a handful of people who have even caught all of the available Pokémon, most people haven't even seen all three fully evolved starters, all because it's fuckin impossible to track down certain Pokémon without the use of some dumb website.
Niantic killed their app and they should be held accountable for it.
It is possible to track, most people just... welp... needs handholding, console, dumbed down, kids, non pcmasterrace etc, you get it.