Let's settle this:
Blockchain is just a dumb database, the feature that makes it amazing is trust-less ness.

Its not meant to make a decentralised uber or a Tic-tac-toe game.

Leverage the advantages of the system and solve real problem.

Atleast with a blockchain verified tic tac toe, there would be no doubt you beat him on that day, so he won't be able to decline it at work, when the rumours go around.

Shhh I need to boost the stocks of my company.

Last line of your rant is absolutely perfect. Won't comment on second line because don't know much about blockchains

I love thinking about using Blockchain as a way to store Health Data, meaning that your medical records can't be changed, can be very easily shared between doctors and also the data needed for analyzing mistakes that are made can't be tampered with