You're probably right.  That's why in my podcasts I'm going over my journey from the beginning.  Because I can't be sure what effected me and what was just coincidental.  But I always found it interesting when people talk about words or sounds they have issues with, even therapists have asked me, when I think every stutterer knows those words aren't actually difficult for them to say.  If someone hangs up the phone for instance, they can say anything after.  I genuinely wonder why, even today, people put emphasis on words as if they are a problem source in themselves.