You didn't just say that.
HAHAHAHAHAHAHAHAHAHAHAHA!!!
to the original poster. flushing wont hurt, it is Prevenative maintenace for people using salt based fertilizers. prevenative meaning your are doing maintanance to prevent issues from occuring(salt buildup and nutrient lockout)
its like dusting your computer, or doing a oil change, yes the car or PC will run fine without doing it but theres a chance later down the road that the buildup of sludge/dust is going to impact you machine (or salts and your plant)
you may go the entire grow harvest and say flushing is a waste of time, then 2 grows later you will issues, then you will say "well i guess its not a bad idea"
my personal opinion, its a good idea to do a good flush every 4 weeks after starting you nutrient regiment. but thats my opinion. theres a good chance you will be fine and it wornt effect you, theres a good chance it will. I will add 2 things
1) better safe than sorry
2) once you notice a lockout (if it happens) and fix it your plants are going to look like shitballs