Successful data management strategies start with quality control by Martin Doyle via @infomgmt

There is the obvious waste in data, but it’s the bad decisions - when based upon false information - made with a high degree of certainty that do the real damage.

Bad quality data gives you results that you cannot rely on - if you can't rely on it what is the point doing anything with it?  I certainly wouldn't risk my business on decisions made with bad data.