并非无用；并非没益处
If something might/would not go amiss, it would be useful and might help to improve a situation.
A word of apology might not go amiss. 道个歉或许并无坏处。
A sense of proportion would not go amiss in all of this. 在这种情况下有点分寸感应该还是有好处的。
A bit more time spent on preparation wouldn't have gone amiss.
I think a little advice on healthy living wouldn't go amiss.
A few more hooks for bags and coats might not go amiss.
See also: amiss