I don’t know if those useful features are the main reasons VPNs are used, though. There’s evidence they are used often for bypassing blocked sites (like VPN downloads jumping in Russia recently), most of the other advertised privacy and security benefits are questionable. Most of them don’t advertise torrenting/piracy because that’s a legal gray area.
My VPN advertises protected torrenting as a feature. Many do.
And it’s pretty nondebatable that VPNs are advertised for getting around regional blocking for Netflix etc, or generally getting around censorship like in China.
Ironically, almost all the exit VPNs are owned by either China or Israel. With a few exceptions.