You are conflating two different things. The post is about virginity being "significant" but your position seems to be more about your first sex being "especially good" which is not what any person ever claims.
Also no one is shaming you in this thread. I guess maybe you had bad experiences elsewhere? There is nothing shameful with not caring about your virginity but that isn't a common position.
I'm glad you reached peace with it but from my perspective, that teacher is a mega jerk.
One time I was day dreaming in class, I forget about what but 100% not aware of my surroundings, and the teacher stopped the lecture to ask me to "stop smiling at her like that it's weird" in one of my highschool classes. It didn't really 'bother' me but I did consider filing a complaint with the school lmao.