You definitely have a point here. The Law of Comparative Advantage is an extremely powerful driver of improved standards of living. So you definitely shouldn't try to do everything yourself.

But at the same time it pays not to over-specialise. If you rely on another person to fix your computer problems for you (for instance), that might work fine, until they aren't available for some reason. Then you have a choice between working it our for yourself or just giving up.

So I'd say at the very least overcoming "learned blankness" is helpful for implementing a back-up plan.