The good life is the phrase in both bios and nobody has pulled on it
Lucia wants the good life her mother has been dreaming of since Liberty City. Jason grew up around grifters and ended up working for drug runners, which is what happens to someone who never had a version of it to aim at.
Every GTA protagonist before this wanted something specific. Money, revenge, respect, out. This pair want a category. Not a house, not a number, just the good life, which is the vaguest possible ambition and the one most people actually have.
A story about two people who cannot articulate what they are working toward is a much harder thing to write than a story about a heist, and it is the only thing the marketing has consistently said.