Change and reform from a tactical perspective

Hello Rabbi, I started reading “No Man Has Dominion Over the Spirit” and so far I can’t stop.
I just wanted to ask if it wouldn’t have been worthwhile to avoid the thing that caused people like Yeshayahu Leibowitz to be immediately expelled, since they created the feeling that in order to live more correctly according to their system, you must leave your religion, or at least the ideological stream to which you belong, and join a completely different and new stream, which currently has 1 known member (the thinker himself).
It should be noted that my question is not substantive, although I feel that such a question may arise after I finish the book and can say that I can stand by the lines of your doctrine, and I would also be interested in receiving a response to this, whether there is nothing wrong with presenting an independent religious position and whether “one’s own faith” (as claimed about Prof. Leibowitz) can provide a solution to a religion that has existed to this day through tradition (I came up with a shocking formulation due to my failure to define the last question, but I hope you recognize the problem to which I am referring in the question)