Bring any topic however widely known and thoroughly proven to a large enough general audience and you will always find people with no actual knowledge that will question it.
Try to find a post on HN with a lot of upvotes and comments where everybody would agree on something.
If you want to know if there is "physics debate" ask people who know physics, not commenters on Youtube or HN.
However, saying the phrase "a <n> debate" -usually- leads people to believe there exists a debate about <n> in the field of <n> between experts who study <n>.
Try to find a post on HN with a lot of upvotes and comments where everybody would agree on something.
If you want to know if there is "physics debate" ask people who know physics, not commenters on Youtube or HN.