Dear Brunobm,
to help your studying look at this topic:
I gave this citation:
The Netti-pakarana (587):
Tattha Bhagava tikkhindriyassa samatham upadassati, majjhindriyassa Bhagava samathavipassanam upadissati, mudindriyassa Bhagava vipassanam upadassati.
Herein the Blessed one teaches samatha to one of keen faculties; The blessed one teaches samatha and insight to one of medium faculties and the blessed one teaches insight [alone] to one of blunt faculties.
These days there are many confusions even about what jhana is and how to achieve such refined superhuman states. It is certainly difficult and then even after attaining there has to be mastery of jhana before it can be a proximate cause for attainment. Still it is true that all kusala is a support for development so yes if one has that rare ability then that is an asset - but it still needs to understood as a conditioned phenomena -(look at the Brahmajala sutta where some wrong views are based on the attainment of jhana ).
In daily life there are other issues too. We may have an idea that there needs to be a level of calm first before there can be understanding - in which case there will be tendency not to face the present moment as it is. Defilements, subtle and strong, arise often in a day and the way of vipassana is not to suppress but to understand them - they are mere conditioned phenomena. They fall away anyway. As @Namyal alluded, the complicated mass we call life starts to be untangled.
And if properly understood the way of dry insight is direct and available at any moment.