I don't know Vitalik and don't know what his intention was, but it's well written and people will read it and at least think "why is this argument wrong?" (And likely realize it is not, and become Bitcoin maximalists)

My theory is that he is thinking about those questions deeply but can't say out loud because people would throw rocks at him and more importantly it might seriously hurt some people invested in ethereum etc. And this April fools plausible deniability gives him and other people a little safety net to test the waters.

In my opinion, a master move. Of course I could be wrong and maybe he just wrote stuff for fun, not really thinking about it, but either way it will have some impact.