Why do people round my height to 6ft when I’m actually 5’11”3/4?

My doctor does it and people does too and kept fighting me to stop denying that I’m 6ft and just accept that I’ll never be a little woman! Even most little women wanna be a little bigger and I’m very lucky to have a tall height and people won’t mess with me since I’m large built (no offense) and people take me more seriously. But guys prefer short and average size women and us tall women get ignored or passed. I have no problems dating a shorter guy because one of exes was 5’7” but he dumped me for my height and a 6’6 guy said I was too tall for him. He had a crush on my 5’4 cousin.