The more data you collect the harder it is for someone to claim they didn't authorize the charge. So know you don't need all that data, but if you had a dispute you would wish you had it.

Since your transaction fees are based partially on your dispute rates not collecting this data could move you from 3% to 5 or even 7%.

Imagine giving an extra 2% of your Gross to fees. So people collect more to limit fraud.