Why do people want to avoid aluminum foil when roasting garlic

Thank you all for the information responses!

Public opinion runs on buzzwords- aluminum has been associated with "bad" in the kitchen, and people try to avoid it in any usage. Aluminum foil is great stuff for any number of uses; the actual deaths attributed to its use are not many.

Hi Devin, personally, I find aluminum foil to be super-handy when roasting garlic—it acts as a disposable, oven-safe vessel, and you can shape it to form a little packet around the garlic to aid it in even roasting. My guess is that people looking to reduce their foil usage might want to roast their garlic in a different sort of vessel—a small ceramic or clay baker could work, but then you'd want to make sure it has an oven-safe cover, too (else the garlic might more easily burn as it's roasting).

my guess is that