My daughter’s dyslexic, dyscalculic, and dysgraphic. We aren’t giving her the option of going to a college where she can avoid any one of those topics because she won’t have that luxury in the workforce. If you can find resources to help your son learn to write, I’d take them. My son is a comp sci major at a state school and his professors were happy to learn he has awards for his writing. They seem to think it’s a valuable skill for their field.