This is exactly what I think, I'd like to see how Alphastar react to "cannon rush" or other weird bo where you need to be "smart" to counter it and just not be based on insane / none human micro.
Still, he didn't do that either.
Typically, you don't see more than 1-2 photo cannons, because you don't usually want to "over-invest" and lose what advantage you gain.
Printf is part of a fairly small group of cannon rushers that don't simply see it as just another cheese, because what generally defines a cheese strat is that it can be easily countered if you know it's coming; not so with their cannon rushes.
Now, with that said, Printf (or any other "I always cannon rush" player aren't winning tournaments), but that's partly because not many players decide that they want to stake their development on any one strat like that, and if they do, it'll likely be one that's deemed more legitimate by the community.