> If you still feel uncomfortable having another person next to you while you write code, it might be because you aren’t particularly happy with your own code, or the process that you follow in order to achieve some result.

Or the process of constant all-day interaction with another person is just personally draining for you because you're introverted / have social anxiety, or because you have to juggle multiple responsibilities inside & outside of work and don't want the scheduling or social overhead to manage the back-and-forth, or for any of a plethora of reasons besides "something about your process is flawed".

This sounds a lot like "if you have nothing to hide you don't need privacy" argument. Some people just hate pairing because it doesn't jibe with their personality or work style.

Draft PRs + a culture of continuous reviews accomplishes much of this without taxing people who hate pairing.