ironically I think it's more confusing, if I tell someone I'm an egalitarian they honestly might not know what that word means at all, whereas at least if I say I'm a feminist they are closer to understanding that I'm in favor of women's rights ...
What my physical therapist considers "feminism" is not something I generally take seriously as a real meaning of feminism, it's a strawman, and it feels wrong to me to cede the meaning of the word to something so contrary to the actual context of what feminism is (both historically and in its present forms).
There are a variety of feminisms, but none of them advocate for the kinds of things my PT believed, so ... I don't know, it doesn't seem reasonable to only call myself an "egalitarian" and not use the term "feminist".