ignoramous I think many users who want to use Rethink DNS are power users.
You could always do an "Expert Mode" like ublock if you wanted.
A lot of times I wish I could route everything through Orbot or Invizible, but some things won't work as a result. It's possible to use Orbot and FoxProxy in Firefox on top of it, but it means having a socks that will easily connect and a lot of times socks cost money, plus some Apps won't work with that configuration. I also would prefer to not have my ISP have a record of my being a Tor user. Many people use VPNs for many things. Tor puts me into a different pool of users.
Rethink is already an incredible App and everyone is really impressed by it and I could be the only one who wants this. A feature like this would mean a lot of coding and be hard to do so I'm just glad Rethink exists!
Although the poster above said Rethink is complicated, the only reason I don't use it is that much is the proxy doesn't offer the level of control I wanted. If I could Daisy chain VPNs then I would just have Rethink be something that analyzes or blocks packets prior to getting sent or coming in. But the options for proxy inside the App still mean everything is either coming out of 1 IP and I don't want that because so many servers and data centers are owned by big tech and able to do things like calculate ping time to guess which user is which.