It's clearly an exaggeration, but it's also purely delusional to say she had no effect or impact on today's artists.
I don't see it. Especially with today's artists. I don't see it in Katy at all, Beyonce even a bit tbh she's her own thing entirely, I don't see it in Ariana, Iggy ?? Maybe a bit with Miley bc of the rebellion thing (the fact M fans have to downgrade Erotica's impact onto Miley Cyrus is tragic enough) or maybe Gaga bc gays.
I see MJs influence, I see Janet, I see Mariah. I do not see Madonna.