I used to think that Microsoft/Google/etc only hired amazing super-geniuses and I could never walk among their hallowed halls. It turns out, though, whiteboard coding is a skill you can develop just like most skills. The evil logic puzzles they used to ask at Microsoft are a skill you can improve as well, but hopefully you won't run into those.
This probably feels great to say... but in reality 99.99% of developers will never be anywhere near the standard for Google even if they waste years grinding at Leetcode.
I also disagree. If you are able to pass leetcode style test you have a very good chance at getting into a FAANG. It seems to be all they really care about.