That's a far stricter presentation of Scrum than it deserves. The scrum guide doesn't prescribe a sprint length any more specifically than "less than a month";

That's a far stricter presentation of Scrum than it deserves. The scrum guide doesn't prescribe a sprint length any more specifically than "less than a month"; it doesn't say "you can only deploy once a sprint". Now, it might be that some people selling Scrum have Very Specific Views about some of these things, but that's not Scrum either.