To me your reasoning doesn't answer the actual question in any way.

For me neither! That's the reason of the topic! Thank you for your reply!

I wanted statistics just for fun, to find out how many times out of 100 or 1000, the randomness of .shuffle() gave me a resolvable game. Again, JUST FOR FUN

But he told me that in GENERAL, statistics aren't usefull for the develop process. And that's the question, WHY

I know statistics may give you the average use of a software, so it MAY be relevant, but not for the design or develop stage of making a software.

What do you think?