That is not true. If you have plenty of lands and they don't put pressure on you then there is no need to break the Standstill early. It prevents them from casting spells too and allows you to draw out of your flood.
The "break Standstill asap" is a rule for Aggro decks that play against Landstill because they lose the late game anyway. Especially new players often refuse to break Standstill when for example they play Goblins vs. Landstill and they can Waste and Port the first Factories.

