Annoyed by the vegan doctors!

I don’t have just one OB. They switch off at the clinic I go to & the only 2 male OBs that are there are vegan. It seems like when I do have an appt with them, they try to have me go vegan but I just can’t do it. I’ve tried it for a week & just couldn’t! I even told them I don’t think I could 100% be vegan & it’s something I don’t want to do. They tell me this because I did have GD with my son last year and at high risk for having it again with this pregnancy. I know there’s other healthy options to try & prevent developing GD again but they make it seem like vegan is the only way lol. Don’t get me wrong, they are very nice doctors but it kinda gets annoying lol. Idk I just felt like ranting about it😂. Would you be annoyed too? How would you feel?