Yes you are right, some people do watch chess engines play. TCEC (Top Chess Engine Championship) [1] streams them. Popular chess YouTubers goes over engine games from time to time too.
Mostly nobody cares about professional chess. The number of people who are actually interested in today's game and not the drama are a tiny sliver of that. This is actually great because it means we can train and evaluate both without interference from chess players, possibly even building a stable society.