So let me double check to see if I'm understanding you correctly; Are you not okay with the fact that I brought up her late schooling solely for explaining her bashfulness? Because for that I apologize. I didn't intend to, but I also know I didn't consider bringing up homeschooling for any of my other characters, and I'll keep it in the mind in the future because I do have other characters with unique schooling experiences.
However it still stands that it affects Tammy personally and I'm sure it impacts many other people still as well, including myself. The point is, there is a wide gamut of reasoning, whether it might be "an attribution error" or not. I'm not saying this factor single-handedly impacted my life or Tammy's, but it DID uniquely effect how early we interacted with people in public school. She also turned out to be incredibly outgoing, so if anything she proves your point that late schooling did not influence her. It affected me more considerably, and both are valid. I think it's harmful to silence and invalidate experiences just because it might 'seem stereotypical' or 'not-nice', please understand that.
I will be mindful of it in the future still though.