Pressure cooker is better than a cheap rice cooker, but a higher end rice cooker is about the same. You can do more stuff with the pressure cooker though.
I believe the article, in the very narrow thing it actually claims, which is that the starches that come off of rice in washing don’t matter much in how sticky the rice is. That’s mostly down to what kind of rice you’re using. Short grain is stickier, longer grains are not.
I’m still 100% going to wash my rice because I don’t want to deal with the cleanup on that extra starch, it gets everywhere. And while I haven’t had bugs in my rice for a while, it happens sometimes.