They almost always mean “talented/experienced” people are in demand. Not some random who did a bootcamp and watched a few YT videos and can barely copy and paste from stack overflow.
That's without considering the related huge levels of gatekeeping now happening in hiring. Some experienced people are just too jaded to deal with it.
Or make them do leetcode stuff, I think this situation is basically what that whole part of the process is for.
I've done this many times (before working in big tech) and I have always received a response. There is only 1 company that I've failed to get through for at least some kind of a screen: MSFT. They seem to want nothing to do with me.