It's possible (I would say likely) that there was a warning light. During normal aviation takeoffs, there are procedures that govern when it is too late to abor

It's possible (I would say likely) that there was a warning light. During normal aviation takeoffs, there are procedures that govern when it is too late to abort, and procedure dictates that it is safer to attempt flight. For a carrier, I imagine that point-of-no-return is about a few feet from stationary.