The implied near-orthogonality of competence and evil breaks down specifically in the context of power relations. The competence that gets you to the top of a pecking order is competence at suppressing rival coordination, and that’s constituted by dispositions you can’t cleanly factor out and still have the same person. Stalin’s paranoia was the manner in which he suppressed a palace coup. Sometimes people really do compromise themselves or narrow their metaphysics to embed conflict, as the price of being quick enough on the draw to maintain power.
A Putin free of the need to spend most of his attention suppressing his subordinates’ capacity to overthrow him is a Putin who suddenly has a ton of degrees of freedom he didn’t have before, which would likely be disorienting, overwhelming, and maybe even painful, like an upper middle class neurotic going to their first silent meditation retreat.
Not endorsing Kelsey’s position, though. The idea that it’s okay to kill Putin because he’s a bad guy is ghoulish and reflects what seems like a dearth of curiosity as to what the near counterfactuals are; I think the simplest explanation is probably just uncritically accepting American political propaganda. If Kelsey could manage Russia better from Putin’s position than he can then she should be trying to either overthrow or better yet advise him, but should also be a bit confused about why someone kinder and wiser isn’t already doing the job.
Relevant: Civil Law and Political Drama, Should EA Be at War with North Korea?
COINTELPRO includes more than one example. Do you think that the FBI stopped doing their job immediately after the Church Committee hearings or that they kept doing their job but it made no difference?
The Wikipedia entry says Carter specifically banned political assassinations, which by omission implies a considerable remaining mandate to do COINTELPRO and MKULTRA style stuff.