This is actually one of the big differences between generations. It’s not just the norm for young people to share locations, but rather almost expected, with real social consequences for not. Yes it’s probably a little weird to have someone’s precise location 100% of the time, but since you’re sharing it with me there’s a good deal of trust implied (though this is not always the case as it has become more normalized). However, if we stop sharing locations, that usually implies a divorce of the relationship. People will shut you out of their life if you stop sharing your location with them, no matter the reason. From that lens, the choice is simple. You’ve gotta share your location, even if it’s a bit icky from a privacy perspective or you risk losing an entire cohort of friends. I will admit, there is a strange level of intimacy for having done it. In a world increasingly dominated by the pixels on this 4x8 screen, it is a nice reminder that the text bubbles on my phone actually come from real people that I can show you on a map.
(Obviously you can find friends who don’t care for it and you can live a normal life and be just fine. I’m privacy conscious but I still share my location with a handful of friends for the above reasons.)