That isn't how swappiness works.

Changing the sysctl for swappiness only adjusts the ratio of anonymous and file pages, it doesn't set a "threshold" or "aggressivity" in swapping pages, nor does it dictate how much or how little to swap.

It's generally ill-advised to touch swappiness at all unless you know what you're doing. You can start here.

If you're going to hand out free advice, at least make sure the advice is worth the price of admission.