I think that this sort of language, as well, does a lot to exclude people.
Imagine, for a moment, being a relatively new person who is encountering the "subjective" experiences while running into the "objective" roadblocks, surrounded by people speaking purely of the subjective and not of the objective. Imagine being someone unsure about if your tulpa is acting randomly because you feel your thoughts sort of becoming that of the tulpa, and being next to someone who feels the same way, but does their best to never actually make that clear in their language.
In that case, the person who faces the doubts and the issues, is going to continually feel they have failed, let things down, or otherwise have not been successful. It may well drive them away from the community, and I think this occurrence is more common than one might first expect.
It is possible these people lack real tulpa, and truly have failed, but honestly I do not believe that is the case from what I read and see from what others with tulpa, who speak and act and say they have tulpa, write.