Entirely a personal preference - to do my fakemenco sh1te on the nylon stringer I need a bit of nail on thumb and index (and the other fingers, but I'm super kak @ rasgueo) . I do like the sound of nail vs a plectrum - for me, it's just a extra tool rather than fingernails are better than a plectrum.
Oddly...I do use a bit of nail when fingerstyling bass - which isn't common. I'm pretty sh1te at picado (flamenco fingerstyle) on guitar, but on a bass, it seems to work for me.
So....I dunno -> explore, experiment and have fun I say 😆