“Diversity thinkers”? Who comes up with that terminology?
The pipeline is a valid argument because that’s exactly what’s happening.
Anyone who disagrees ought to first take a look in the mirror: have you ever bought your kid a gender-specific toy? A doll for a girl? An action figure for a boy? Because if so, that’s the problem right there. The problem is you. The problem is social. The problem is parents holding their girls back by only giving them “girly” things.