IIRC, "target-rich environment" was originally a euphemism for being surrounded by the enemy.
By analogy, a "goal-rich environment" might be one in which you are very critical of everything — no matter what you look at, you can see a way in which it sucks and should be improved — and a "goal-poor environment" is one in which pretty much everything is okay with you.
I don't know if you are extremely optimistic or I am misunderstanding something, but much much more common is the case when you feel entirely powerless to change the things you are critical of, because they are set up so by bigger, more powerful people or some other similar cause, or simply you don't think you are the kind of person who can tackle big things. Low self-esteem is the most common cause of feeling goal-por. BTW the analogy stands: the most common move to being surrounded is not shooting in 360 but surrendering.
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