Ask HN: Why do so many apps on my iPhone need bluetooth?

I just installed iOS 13, and one of the features they added was a warning every time an app tries to access bluetooth. Pretty much every app I've run has asked for bluetooth access. Audio bluetooth is separate so it doesn't warn about that, so none of this is audio related.

I understand that a lot of apps use bluetooth beacons as a workaround for location data, since iOS has given a warning about location data for a while, but some of the apps have no need for location data. Are they accessing it just because there is some standard iOS library that does it, or is every app really tracking my location? Here are all the apps that have asked me for bluetooth permission in the two days since I installed iOS 13:

Amazon (Already has location allowed)

Amazon Alexa (Already has location allowed)

ESPN

Facebook

Feit Electric

GasBuddy (I already gave it permission for location services)

Google Maps (already has location allowed)

Wear OS

YouTube

YT Kids

Hulu

Downcast

Netflix (Already has location allowed)

Sonos

Spotify (Already has location allowed)

Snapchat (Already has location allowed)

Waze (Already has location allowed)

PBS Kids (Already has location allowed)