C.A.
I think she is just noticing other 'things' children who are developmentally average do that your son can not yet.
Also, you will be surprised to learn how much a child's gross motor skills play into their speech and language skills. My child qualified for two hours of speech and two hours of OT a week. As it was explained to me, the better his gross and fine motor skills became, the speech would follow.
She may be thinking how to get you OT services too. So, I would let her evaluate the whole child. It will be an important step in working with his severe speech delay.
As mothers, of course we often find ways to help our children and this can come across as a crutch. My husband often acused me of 'babying' our child that qualified for services. Some of it is just to get through the day and some of it is just a habit. I always figured that my son could only work on so many things at once so for us me dressing him until he was started first grade just made our lives smoother.
Good luck, you probably have a long road to travel but you can do this. There was a time I didn't think my son would ever speak and he is now above grade level in 2nd grade (and talking up a storm!). Keep strong!