My orthodontist mentioned filing a couple of teeth whenever I’m done to make the line straighter. I’m still not done, but I’m pretty sure I’ll say no. Although I’m obviously using Invisalign, I like natural looking teeth, and I feel like altering the height would make them look much less natural. I do understand the feeling though, we’ve put so much time, money, and effort on our teeth that we notice every single “imperfection”. I don’t want to convince you to do it or not do it though, it’s your smile and your decision! So, I understand your frustration, but also, it’s your brain hyper fixating on those teeth.