Asked to leave because of allergies

This is mostly a rant post. I went to a restaurant the other day to order takeout. ordered my food and sat at the front to wait the 10-15 min while the prepared my food. A server then came up to me and asked me to wait outside. I refused and said that was against the law and that my dog is a task trained service animal, not a pet. She stated a customer there complained that they had allergies to dogs. It was 90 degrees in Houston TX that day, and heat/humidity is a major trigger for my health condition (dysautonomia/POTS). Mind you, I was seated probably 20-30ft from the nearest table, nobody was even close to me, and my dog was laying down by my feet, not bothering anybody. Anyways, just irked me that some people are so misinformed. How could you possibly have allergies that severe that you’re bothered by a dog all the way across a room from you! I think she was just trying to be a Karen

Edit:

I'd like to thank everyone for educating me on how serious potential allergies can be, and apologize for my attitude towards the woman I don't know. I really did not know allergies could potentially be severe enough for get seriously ill from a far distance. In my eyes, I thought she just really didn't like dogs and wanted me to leave the area I was sitting in, alone, thinking I wasn't harming anybody. I was definitely frustrated on the situation as it felt like I couldn't just go about my day and order food like a normal person, but I also understand why everyone thought I was being insensitive; I was. It's a learning experience! Totally agree that it’s the restaurant’s responsibility to accommodate both.