> Just like you don't own anything digital

True. But blockchain tech changes absolutely nothing about that in the realm of games and media, having a flag in a decentralized database does not protect me from a (game) server owner banning me, a drm system choosing to ignore said flag, or shutting down the whole game and refusing distribution. In these situation only piracy would help, and we don't need snakeoil for that.

In the end there will be a centralized entity with the power to deny my access.

Neither do cryptocurrencies change anything about this in the realms of finance as long as their complete existence builds on top of banks and exchanges, which it very much does.

Cryptocurrencies are not an alternative, they are an addon at best.