You make some good points .Yes,many schools are turning the ESL proffesion into a farce,with their desire for young good looking comedians.
However I believe ESL is a genuine profession .Yes, anyone can do what many schools require from teachers ,namely to pull faces,sing,crack jokes ,jump up and down and play hangman for forty minutes or so ,but not everyone can teach English properly and well, lesson after lesson ,week in and week out to, often uninterested, or unmotivated students,while also making it interesting.

Injecting enough humour, or challenge into every lesson, while still improving your classes English is a REAL CHALLENGE!

It's not as easy as people say to be a truly sucessful teacher of ESL especially if you teach abroad!