Gee!
But until we have more information, I propose that we place the following stickers on all high school physics textbooks:
“The theory of gravity is a controversial topic, and the student is encouraged to evaluate the full range of scientific view that exist, including why gravity generates such controversy.”
These stickers will serve a vital function. They will draw the student’s attention to the controversy and help the student avoid jumping to conclusions. After all, if the student jumped, it’s controversial whether or not he’d come back down.
(Note: Special-purpose neural equipment may be required to comprehend.)