Examples:
- いくら若いからといって、徹夜を続けると体を壊しますよ。No matter how young you are, if you stay up all night, you will break your body.
- ドイツに留学したことがあるからといって、ドイツ語が流暢に話せるとは限らない。Just because you have studied abroad in Germany does not mean that you can speak German fluently.
- 親だからと言って、勝手に子どもの人生を決めるのはあまりよくない。It is not so good to decide a child's life without permission just because he is a parent.
It is equivalent to "~だけの理由で", the former is to propose a reason, and the latter is to deny it, and that the reason is not established or insufficient.