yes but if you mine a valid block around the same time someone else mines a random block you can't know until another block is mined (and even then, you might not know)
The only way you can use the concept of Schelling point is to explain why so many people use Bitcoin rather than Litecoin or another slightly-tweaked variant. Much like the example in the article, if you ask anyone to pick a cryptocurrency to pay with, they are likely to say Bitcoin because it is familiar.
The reason people avoid invalid blocks is because they would have to convince every other node out there to accept it. It's a coordination issue.