You mean "the absorption and digestion of food or nutrients by the body or any biological system" ? Without it, it would very difficult for life to exist.
Is assimilation good or bad, why?
Assimilation by the Borg is not a good thing.
Resistance is futile.
When it supports the objective good, it CAN be good in parts or pieces but not in entirety.
Obeying the Speed limits promotes a "Safer" environment for other travelers on the same road . . . As does observing the other laws for safe conduct . . . But nobody says you have to listen to the "Carpenter's Greatest Hits" within your car . . . Feel free to dress provocatively and jam out to some "Disturbed" to maintain your own individuality . . .
Your path is your own.