Would you be interested in giving them your phone number? how about your contacts as well? maybe your own voice? apps have you've installed? and when you're not using the app, keep them posted on your location while you're at it too.
> Them selling my data to others without telling me is unethical.
Ever heard of 'Real Time Bidding?', Google sells your data to advertisers to the highest bidder [0]. Planning on becoming an activist? I've got news for you, law enforcement also want your data and Google sells it to them upon request at any time. [1]
I know they do, but a lot of their users don't which is unethical. But this comment was about the Jet database listing a use case about speed vectors. There is absolutely nothing unethical about that use case nor technology. All the other issues you list, absolutely, but those are not things Jet does.
Unfortunately it is under a company known for shutting down products and that spies on you. It is better to use alternatives like Open Street Map, or if there was absolutely no other option, Apple Maps.
Them selling my data to others without telling me is unethical, but that's not the case that Jet describes.