"Medical science" didn't only just discover the clitoris 20 years ago... Fairly accurate descriptions of the structure of the clitoris go back to the 1840s. It's the textbooks used for medical training that were omitting the already known structures to the detriment of medical professionals and healthcare.
Never mind that discovering and accurately mapping something are very different. That's like saying we hadn't discovered the moon until we saw the other side.
It's a funny meme that scientists couldn't find the clit, but it detracts from the actual sexism that was preventing the known science from being taught properly to doctors.