You're right, these are separate issues. What you're describing is really just money laundering, which is already illegal and there a number of dimensions available for this to be discovered and prosecuted under the law. What the person you are replying to is concerned about - and rightfully so[1] - is that zealous enforcement of banking controls, even though it comes from the same principled place of "dictators shouldn't be allowed to hide their funds in country_that_has_laws", can and probably will result in banks making decisions about who has access to banking services based on internal political dynamics. It's a huge elephant in the room that I think deserves more discussion and scrutiny.

[1] https://twitter.com/OttawaPolice/status/1495367658132361216