>...to hitting the reply button, setting focus on the reply entry form, composing a well thought-out and cogent response, and then hitting the reply button
You forgot about "having to hit each and every individual key used in word formation in the correct order, some keys more than once (and a few several times), having to adhere to reasonable rules of grammar to string the words together into a sentence with meaning, and to remember to stay on topic and respond to the comment rather than slowly drifting off topic into a stream of consciousness, having to maintain visual focus on the screen while typing, and after hitting the reply button, waiting for the comment to refresh, and then another 30-40 minutes refreshing to watch my karma".
I think you assign far too much effort to the task of typing a single sentence.
You forgot about "having to hit each and every individual key used in word formation in the correct order, some keys more than once (and a few several times), having to adhere to reasonable rules of grammar to string the words together into a sentence with meaning, and to remember to stay on topic and respond to the comment rather than slowly drifting off topic into a stream of consciousness, having to maintain visual focus on the screen while typing, and after hitting the reply button, waiting for the comment to refresh, and then another 30-40 minutes refreshing to watch my karma".
I think you assign far too much effort to the task of typing a single sentence.