> What this evidence shows is that is appeared already optimized.

There are plenty of viruses from animals known to infect humans, viruses that have never been in humans and are not evolved to infect them, this happens alarmingly regularly. Here's a couple you've probably never heard of: https://en.wikipedia.org/wiki/Australian_bat_lyssavirus , https://en.wikipedia.org/wiki/Hendra_virus

There is absolutely nothing amazing about covid being able to infect humans, it's exceptional because it can pass from human to human and because it's airborne(ish).