If every leader I have ever worked for who was deemed 'experienced' enough was as several of you have described then I would agree, conversely if all those inexperienced ones were like you suggest. However as someone who has: never led a core subject taught KS2 and 3 but never KS1 appointed HT in a school with many staff old enough to be my parents! I am clearly not up to the job! This is despite having presided over the biggest increase in results the school has seen in living memory, changed the leadership of the school from Jean-Luc Picard with everything controlled from the bridge (by apparently VERY experienced HT according to his CV!)resulting in unionised staff to everyone feeling involved and only losing one member of staff (to retirement!) in the process. May as well hang my boots up now as I was only a lowly Assistant Head before I became HT so cannot possibly have had enough experience to make any more progress. Or alternatively as professionals we can recognise that age and experience do not necessarily go together and look at the attributes each person has. We can all reel off anecdotes.