Do some Christians think before they say "I'm gonna pray for that"?

I'm sure this guy wasn't trying to be offensive, but I get annoyed when people do this. It's not even because I'm agnostic. I don't mind when people say they'll pray for me but do some think maybe don't say that.

I was having a conversation at Walmart with a man who is always there. I work at Walmart but was shopping with my kids and he said hi. My 10 year old son was sitting in the cart playing on his switch. My son calls me by my first name. He has autism and he doesn't like mom or dad because it doesn't make sense to him. Calling me by my first name feels more personal to him. When he called me by my first name the guy kind of tried to scold him and say respect your mother. I told him it's ok. That's just what makes sense to him. I explained he has autism and his brain is just wired differently. This man says "Oh I'm so sorry. I'm gonna pray for that God takes that away." Well that's a little ablest. I told him that autism is apart of him. He is still so smart and his autism gives him a different way of thinking which has helped him a lot. It's apart of him and I love all parts of him. He told me autism is not a fruit of God and God will cure him and tried to place his hand on my son's head. My son doesn't like being touched and I kind of swatted his hand away and said he doesn't like that. Plz don't touch him.

I've always had a problem with people in general who look at people with disabilities with pity and "Oh you poor thing." When so many live regular and happy lives. It's not even the praying issue I have because even if I'm not Christian, sure, I'll let people pray for me because I believe in energy and any positive energy we put out there is helpful. It's the pity of people with disabilities that bothers me. He's not the first person to say they would pray my son's autism away and some people I feel like don't think before they say things.