Is it possible that a Kraft food product can make you sick? It's possible. Anything is possible. But I commend companies like Kraft who go the extra mile to be as clear as possible.
Any time you eat anything at all, you're putting yourself at risk - if not for gluten, then perhaps salmonella, or e.coli, or something else. Food is tricky, and as a customer (as opposed to a grower/farmer) you never know 100%. It's refreshing to see a company do what it can to communicate well with the celiac community.
As for the legalese ... well, unfortunately we live in a litigious world. It would be nice if companies didn't have to issue a CYA statement, but there are too many sue-happy people out there. A business has to look after itself.
Incidentally, I trust the information I find on here way more than I trust information from anywhere else. Perhaps by "gluten-free" someone meant "not containing gluten-ingredients" which (for most) would likely be a safe option? No one here is out to get you or mislead you or get you sick. We're all in the same boat.