-
Yes, you can share location, the widgets aren’t as fancy as Google integration with everything.
-
Not feasible without the constant data harvesting in the background, which it doesn’t do. It doesn’t log your every move as Google does. Privacy vs surveillance, will always be at odds.
-
Depending on the area. In my country public transportation is way better on OSM than on Gmaps. Oftentimes Gmaps won’t even have large structures like train stations or bus terminals. It depends on users and contributors.
You’ll flip when you find out that there are circumstances in which they are mandated by law to share your personal information. That stuff is regulated to hell, and rallying resources to help people sleeping rough is a good thing in my book. Maybe OP doesn’t need the help but the other 99% of the people living on their cars are at huge risk to life. Starvation, hypothermia, malnutrition, human trafficking, prison, just to name a few.