Is the closing of Reader ideal? NO! But you have to know something like that might happen, plus they're giving enough time for people to migrate to other services and exporting your data couldn't be easier.
My question is what are you going to do? Go to other services for everything, never use a google product again in case it closes down? I'd argue that there is even a better chance of any other small dedicated startup to fall apart than google closing down their one of their product, if you wan't to be really sure something is "forever", self host, but don't lie to yourself, that's not even close to a perfect solution.