Users also need other users to be honest about their location. Consider a dating app; you want to meet real people who live in your area, not a fraudster pretending to live just a few blocks away.

Or a delivery driver: You want them to actually drive up to your house and ring your bell, rather than just pretend to drive there and drop your package somewhere else.

Location data is worth a lot more if it is reliable.

The user should be in control of sharing their location. But you shouldn't be able to just provide a fake location.