MultiBeast (older versions) also put them there. For older software versions it worked well but for Mojave and Catalina it can be troublesome for some users. It’s also confusing for newcomers as they can end up with Kexts in both places which can cause conflicts especially if they are different versions.
I personally always test out Kexts in clover first as they are easy to remove and replace. I used to put them in L/E but no longer do so as I’m usually running the latest betas.