Very good question 
, several possible answers come to my mind 
, OP may:
- have a setup working too well and reliably (boring) and wants to introduce some variations.
- like to be woken in the middle of the night or early in the morning to cries of "there is no internet!" or "the network doesn't work!".
- want to exercise his problem solving skills against new, strange challenges.
- want to break Rule #10 of the just published Mikrotik Club Rules:
The twelve Rules of Mikrotik Club
because rules are made to be broken.