But if you can adjust the direction fast enough, you can quickly recover from the wrong direction. That is, it's about speed of adjusting, not just speed. (In sports, it's the difference between speed and quickness.)
Theoretically, scrum was aimed at adjusting faster. But if the adjustments just keep coming, you won't go anywhere.
You might as always happens attack them for not doing Scrum right, and I'll tell you that's the age-old cry of the agile-folks: you're not doing it right, and nobody ever was.
Fuck scrum, it's not agile, never was and never will be.
Thus, the odds of a team knowing where they are going reduces drastically if they start doing scrum.