Because spam sucks!
Seriously. It sucks so much they made it illegal. Then, they required that you identify your company in the footer of all emails sent on your company’s behalf.
Honestly, the last thing you want to do is spam your customers. We're all about love, not spam. Oh, and staying on the right side of the law (prison orange doesn't suit us. Bet it doesn't suit you either.)
Once you’ve updated your company details, you can edit them whenever the need arises and avoid those pesky spam lawsuits.