The difference being that with your spouse you often have an explicit promise of fidelity. You don't owe your employer yourself, they pay you for your time. I think the assumption that "accepting the coffee" equates to an assessment that the current job is unsatisfactory is not as consistently correct as the author implies.
Sometimes accepting the coffee is just taking the opportunity to learn more about the ecosystem you're in. A job can satisfy you in terms of the work, the environment, and the pay, but it can't teach you what it feels like to stand somewhere with a different view. "Accepting the coffee" is an opportunity to stand there.
You don't start learning a functional language because you've made an assessment that you've reached the limits of imperative languages – you learn a new language because in part because it gives you new perspective that, critically, often cannot be gained without going there yourself.
Sometimes accepting the coffee is just taking the opportunity to learn more about the ecosystem you're in. A job can satisfy you in terms of the work, the environment, and the pay, but it can't teach you what it feels like to stand somewhere with a different view. "Accepting the coffee" is an opportunity to stand there.
You don't start learning a functional language because you've made an assessment that you've reached the limits of imperative languages – you learn a new language because in part because it gives you new perspective that, critically, often cannot be gained without going there yourself.