I know lots of 4.0 level players who hit almost as good forehands on either side. That's why they're 4.0, they practice both and neither enough.
I hit a better rightie forehand than lefty forehand. I'm 4.0.
I know a 5.0 winner of the local tourney who hits harder forehand lefty than rightie, and he's right handed.
Ambi doesn't mean much, just practice possibly better served using your normal side.