If you’re asking about this post, the answer is definitely bots. If you’re asking about how someone without the use of their hands can post, he uses speech to text software on his computer, and has enough use of his right hand to click a mouse. He mentions it in that reddit conversation.
https://amp-reddit-com.cdn.ampproject.org/v/s/amp.reddit.com/r/pics/comments/ak4ge8/i_dont_have_use_of_my_hands_so_i_paint_with_my/?amp_js_v=0.1&usqp=mq331AQECAEoAQ%3D%3D