Do most "leaders get there by attrition?

Do most "leaders" get there by attrition? Link takes you to questions CEO should ask; proffer -do most get to management by lasting past the the political BS in organization -maybe more yes than no -go -watch -don't be. it's not hard to be smart. it's hard to be smart, compassionate and passionate, hard to be wrong -no, it's easy. but most managers are afraid. should you not already be asking lots of questions.