Ah, but influenza viruses are not corona viruses. Both families have different types, they infect similar parts of the body and show similar symptoms, but they have different vectors of infecting, and SARS-CoV-2 for instance has sort a proofreading mechanism that makes it mutate at a slower rate than influenza viruses.
Their differences also make vaccines mutually ineffective, that is influenza vaccine does not protect from corona and vice versa. Also treatments of severe cases are different, requiring more intensive life support measures in severe corona virus infections.
Your country's health department, WHO, medical journals etc. have more information on it.
Btw. rarely getting infected may also be a signal that the body's immune system is very inactive or weak, but I don't want to pretend to have deeper medical knowledge. Always ask the doctor. And apples aren't any more what they used to be. And all that. Just reminding my fellows to be careful :-)