we can argue about the choice of symbol until the world ends. the symbol is just a thing people can recognise and rally around.
the first step of any movement is to gather people. then do something. so yes, changing a picture is lazy, but it is a virtual rally point. he talks about next steps in another video: https://odysee.com/@rossmanngroup:a/you-changed-your-profile-to-clippy-now:6