Because someday, somebody's going to come to you and say, I'm from Apple, I'm from Amazon, I'm from Project Zero and you need to drop everything because your project is the new heartbleed or Log4j or who knows what and the world is falling over and if that psychological offramp isn't there, if you haven't laid out clearly what PROVIDED AS-IS means and how you're going to act about it ahead of time, saying "I'll be at my kid's recital" or "I'm on vacation" or just "no" is extremely difficult.