You can be weak so long as you aren't also stupid. If you are smart enough, you can usually find a way through any problem.

If you are stupid, then you have to be pretty danged tough to compensate. Even then you might not make it.

Now, if you are smart and tough, you can make bank.
_________________________
The ultimate result of shielding men from the effects of folly is to fill the world with fools.
-- Herbert Spencer, English Philosopher (1820-1903)