just because; even if; even though
安いからと言って買いすぎてはいけない。
You shouldn't buy too much just because it's cheap.
忙しいからと言って健康を無視するな。
Don't neglect your health just because you're busy.
有名だからと言って必ずしも良いとは限らない。
Being famous doesn't necessarily mean it's good.