Human communication is only 10% the words we use. But the internet for most of its lifetime has been words-only (disregarding recent trends like TikTok). We have lost 90% of what makes our communication human.

There are biological factors as well, not just things like body language. You put off pheromones which I absorb and my brain analyzes for me when I am near you. You don't get the biological aspects unless you're in person.