Question about the Sbux Cold Brew coffee…

Starbucks partners,

Can someone give me a real reason why we can’t serve the cold brew concentrate without water?

I work in a Target Sbux and the only info we got was saying we couldn’t serve no water cold brew because nutritional information regarding caffeine content, but we can add extra shots of espresso to anything, changing caffeine content. You can add pretty much anything to any drink and it adjusts the nutritional content, and customers understand that “risk”. So why is that the reason?

Is there another, legitimate reason?

I looked online and saw partners suggesting it was so we didn’t run out, or because it’s not meant to be served that way (like refresher juice), or even it will make you sick.

I work in an area with very… uhh… obnoxiously inquisitive/paranoid customers. So I really want a more viable reason than “corporate said no” to head off the more… uh… sensitive customers.

Anyone able to offer better logic?