As a mobile game studio,
you know that your financial success
depends on player retention (CPI<LTV),
( whatever monetization model you use;
ads, InAppPurchases and Subscriptions.
depends heavily on difficulty tuning,
which is complicated and tedious:
analytic tools are complex to setup and use,
and they let tune blindfolded!
Too difficult ? A frustrated player will churn
Too easy ? A bored player will churn
And once you reach a good balance,
retention hits a ceiling:
mobile players are very diverse,
one size does not fit all!
You lose players that could stay in your game
if the difficulty was sometimes easier or harder for them.