They're more pleasing because artists and graphic designers used RYB pairings for decades, these pairings all over the place in analog and digital media, people are more used to them. Even Adobe still uses an RYB wheel in their software, RGB only for color grading (it still deviates slightly from a normal RGB color distribution).
RYB is more culturally relevant because artists and designers "produce" culture based on it.
RYB is more culturally relevant because artists and designers "produce" culture based on it.