It’s not about the price, it’s about how necessary the object is to be able to play the game.
Can someone play EVE without implants? Yes, just like they can play without boosters or bling. Implants, boosters and bling modules are all luxury items to slightly improve your effectiveness in space.
Can someone play EVE without ship? No, they need at least a basic cheap ship in order to do anything in this game.
This is why basic cheap ships have insurance, so that players aren’t left without ISK when you lose their basic needs to play the game.