> Why do so many of the comments here and journalists assert that crypto and exchanges are the same thing?
Exchanges are what make crpyto usable, to the extent it is.
> Doesn’t keeping coin in an exchange (as opposed to in a wallet, locally) sort of violate the ideology of crypto?
Maybe, so what? “Exchanges as a venue for, um, exchange” and “keeping coin in an exchange” aren’t the same thing (except to the extent that exchanges make it difficult to move coin off the exchange, which AFAIK usually isn’t an issue for crypto so much as it is sometimes is for fiat.)
> Wasn’t this shit invented to circumvent the banks?
That’s been part of the marketing, sure, and not just banks but the financial services industry more generally. But, as it turns out, you need a lot of those services for anything money-like to be usable, especially when its not the primary currency of the economy you are trying to operate in. A lot of the marketing of cryptocurrency is…not particularly realistic. (Of course, a lot of it is done by the people running the crypto-community versions of financial services, so…)