Sentence: When is too little of something too much?

[Tian]

Some parents ban TV; others strictly limit junk food. When is too little of something too much?

[Tilt]

What a mind-breaker it is! No idea, absolutely...
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We are what we repeatedly do.

[Dieter Radke]

to ban TV = it's forbidden for the children looking TV,
other peole tell their children to eat foot which keeps them healthy!
Parents keep care on the chlldrens health!
Strictly limited means if there's no other food perhaps eat junk food before going to get very hungry

[Tilt]

Dieter Radke

I think the author wants to ask us about the last sentence.

Thanks
_________________
We are what we repeatedly do.