I am extremely ashamed to say I have left a comment like this before. At the time, I was frustrated about never being able to discuss anything over a call. There is no excuse, though.
Often all I want is for my team to approach similar problems differently in the future, not necessarily to refactor the immediate code. Or at the very least consider alternative approaches
Although I much prefer to add automatic code formatting and linting and stuff to codebases to dramatically reduce the occurrence of 'nit:'
This way the value of the pr process is captured: preventing obviously bad changes from reaching prod and two-way knowledge sharing.
Setting a higher bar for reviews more often than not blocks people for days without good reason.