Stop installing python for each package by brew
The nice thing about homebrew is it only installs dependencies needed to build the packages and also that you don’t have to choose just one version of a tool.

Why not let brew install what it needs, but control your path so that you’re running Anaconda from the python you prefer?

Also, brew has a cask install of anaconda as well, so that might be an easier path to harmony if you can’t get away from the homebrew installs for tools.