The ease with which interviews allow the unscrupulous to inflate their abilities has been well-known for long enough for it to be metagamed and exploited for profit and now the effects have become abundantly apparent. Imposters institutionally infested in this manner across industries have reached a critical threshold where their fundamental lack of competency can no longer remain hidden.
If you do the above prep work and pass the multiple interview loops you’re pretty smart honestly. The vast majority couldn’t do it even with all the study possible and even the smartest couldn't do it without any study at all. The bar is pretty high.