So it's less important that people view Raymond, Jeffreys, or Greer as wrong on their treatise of transgender persons (because it wasn't as if they didn't face plenty of criticism in their day) because it's still important to the history of feminism and informs so much of modern discourse. I don't think you just throw away everything in response to new information because the before was wrong, but that the history becomes even more important because it's the key to understanding where we are now.
My takeaways from their writings isn't necessarily a right or wrong thing but that they very eloquently and with more detail and awareness than you could ever ask for explain their own feelings that reflect the understanding and attitudes toward trans people at time. Today I think people would recognize those feelings as transphobia (or I suppose wokeness if you're one of their descendants) but right or wrong the knowledge is still useful.