Sure, but have to understand that a limitation of language is that it doesn't convey perfect information. When someone says "anyone can do it", they mean that most people with full-blown "stuck in the house for years" social anxiety, can actually do it, and they meant nothing negative against those who are truly physically disabled. People summarize their thoughts when they speak and try to convey a picture that most people can understand; they are not trying to hurt anyone
Someone has clarified it twice yet you're still fighting the word "anyone" instead of trying to view it through a reasonable lens. If his point only makes sense because he excluded a very rare group of people, then your point only makes sense because you include a very rare group of people. Have some grace, be excellent to each other.
> Stephen Hawking was still quite expressive despite his limitations, although they did come later in life
He's a fantastic example of why you don't need to rely on body language to communicate emotion and feeling.