Exactly.
@brambedkar59 I think you confused fast startup with hibernation. Hibernation saves ENTIRE content of your RAM to disk and returns it into RAM when you power your PC again.
Fast startup, instead of saving entire content of RAM on disk, it just saves a few small necessary Windows files. This is why fast startup is also called hybrid shut down. Because it combines classic shut down with hibernation.
It's also why it's recommended to disable hibernation on PCs with SSD. My Windows installation currently uses 6,5 GB out of 16 GB. That means every time I would hibernate my laptop, it would unnecessary wrote 6,5 GB on SSD. Might not sound a lot, but if you shut down PC at least once a day, on a yearly basis, it's a lot. And that's how SSD lifetime is reduced; the less writings the better.
Fast startup isn't needed on SSDs because they are fast plenty enough so Windows can boot immediately. Even though it doesn't save a lot of data to SSD and might not reduce SSD life in a magnitude hibernation does, it still unnecessary writes data without any reason.