It is a half-measure, though.

It reduces Twitter's traffic a little. It screws with some of their metrics a little, with the shared accounts having access patterns of several humans all mixed together. It might affect revenue a little.

It doesn't do much to address the underlying issue of there being people who you might want to hear from who primarily post their content on a platform owned by a white nationalist. If you want that to get better, you have to something other than continue to use the platform.

The platform's user base, including accounts created for XCancel/Nitter purposes, forms the value that causes others to post there. Accessing the platform through a proxy still provides value to the platform in terms of user attention.