That wasn't a general purpose "whoops, takesie backsies" clause, it was contingent on financing falling through for an otherwise best-effort deal.

Those sort of breakup fees are to give the company some compensation for non-bad-faith purchasers having external problems, because a failed acquisition is still an expensive thing for a company to have gone through in those situations. A cold-feet buyer throwing shit at the company in public even though he has the means to close the deal? Different story.