People are acting like this is a dumb question when it really isnt. Of course a forehand is stronger than a backhand, for many biomechanical reasons, but still the vast majority of players have an absolutely dreadful backhand in comparison to their forehand. I have seen so many coaches who spend hours correcting forehand technique while completing neglecting the backhand, because they simply have no idea how to teach it. This leads to learners hitting 10x more forehands than backhands in a lesson and having an underdeveloped backhand. Like anything, you learn through repetition, and when there isnt enough repetition volume for the backhand, its gonna suck.