I agree with the arguments you have presented. But you have to remember that when it comes to academia it may not be as time flexible as you believe. A profession in academia can be becoming a professor and with that you have to be at school at certain hours. Being a professor also comes with the advantage of having tenure, basically amazing job security. You also have three months off but you might spend your time doing research. In industry you don’t have the flexibility of taking off for three months to do research or just have time off.