Earlier quoted context omitted.
One thing I don’t get - If you spend much of your time reviewing, you’re just reading - you’re not actually doing anything - you’re passive in the activity of code production. By extension you will become worse at knowing what a good standard of code is and become worse at reviewing code. I’m not a SWE so I have no interests to protect by criticising what is going on.
Tell that to Linus Torvalds. His whole job is just doing code review, and I'd argue he's better at coding now than he ever was before.
Reviewing well executed changesets by skilled developers on complicated and deliberate projects is not comparable to "fleet of agents" vibe engineering. One of these tasks will sharpen you regardless how lazily you approach it. The other requires extreme discipline to avoid atrophy.