If you know this technique, you have a choice - you may use it or not. If you don't know this techique, you don't have such a choice. In any case psytrance is technically very complicated genre, the more various tricks and approaches you have at hand the more creative you may be.
And yes, carefully chosen starting phase with constant retrigger does make psytrance bass more enjoyable because in psytrance you need steady and consistent basslines having hypnotizing effect, this is one of the approaches which is proven to work best.