Is this Pokemon strategy really worth it?

Question

Ive heard that sacrificing one of a pokemon's move spots for an attack that is super effective against a pokemon that is super effective to you is worth the one less spot that could be used for a more powerful / useful attack. Example: A groudon learning solar beam, just incase it winds up having to fight a water type. Is this true?

Answer 1

yes it is definatly worth it. Just make sure that the move you are learning to be super effective against a type that is super effective against you is a strong one.

If you sacrifice one of your strong moves for a super effective one, you can be deciding the match.

like imagine if you had a Victrebell that knew only

Vine Whip

Solarbeam

Leach Seed and

Razor Leaf

What if you went up against a Charizard? Or any Fire type Pokemon? It would be much better if you sacrificed one of your grass type moves for a water type move.