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"That has not stopped the courts before."

Yes it has.
Look, Courts and judges are:
1. lazy as sin,
2. loathe to issue an opinion that might get reversed
and have them looking like stupid $hits.

What to do, What to do??

Well they decide as few cases as possible.
The "cases and controversies" clause is jurisdiciional, i.e., if they find there is no "case of controvesy" they don't have to so $hit, just boot it.

So they have developed three prongs to knock out a case;

Standing- you have to be the person with a dog in the fight

Mootness and its opposite,
Ripeness
These two are straight from Goldilocks and the Three Bears.
You'll recall that the porridge had to be not too cold, and not too hot , but just right.

Mootness means too late-
Ripeness- means too soon.