Throw the baby out with the bath(water) informal slang verb phrase
To eliminate something useful or vital while removing something considered useless, especially an outmoded idea or manner of conduct.
Don't scrap the entire heating system. We shouldn't throw the baby out with the bath because some parts still work well.
Certainly not
To rudely refuse to accept or consider something that one has stated or done.
To escape from someone/something; stay clear of someone/something.
1. To discard something.
2. To waste or not make use of something well.
3. To say something offhandedly.
4. To deliberately throw an incomplete football pass.
To argue with somebody
I do not want to bandy words with you about those trivial things.