Four reasons your version of better might not be enough
I might not know about your better, because the world is so noisy I can't hear you.
I might not believe it's better, because, hey, people spin and exaggerate and lie. Proof is only useful if it leads to belief.
The perceived cost of switching (fear, hassle, internal selling and coordination, money) is far higher than your better appears to be worth.
Your better might not be my better. In fact, it's almost certainly not.