I am literally outside right now. I've always felt that "touch grass" and the like have this ableist connotation where you're baselessly accusing someone of poor mental health habits. And besides, some people have disabilities that make it hard to go outside. Agoraphobia, even just plain old mobility disorders make it a bigger ask to say touch grass of go outside. I guess what you're meaning to say is people spend too much time on the internet. It's an insult that disproportionately gets used against queer and autistic people who will get hate crimed if they be themselves in meatspace. Being online is the reason a lot of trans people haven't killed ourselves. I'd be dead if it wasn't for the internet. And I cycle to work every working day, but I suppose you'd still accuse me of mental illness with intent to attack just for needing an online place to be myself. That, or you're just repeating an anti-trans, anti-disabled cliche because you haven't ever thought about the meaning of the words and just know it's something mean to say to an autistic person without seeming like an arse.