What if aliens came and made everything obsolete? In an infinite universe, anything can happen, and so "it might not work" is is always true for everything. No

What if aliens came and made everything obsolete? In an infinite universe, anything can happen, and so "it might not work" is is always true for everything. No matter what you do, it might not work, and some of the most important and valuable things ever aren't attainable without a lot of investment before you can start to reap any return. Not all ideas are good ideas, so of course there are reasons not to do some things, or to abandon something you started, but merely "what if it never works" is not one. Asking that is about equal to asking what if a piano falls on you tomorrow. Sure it could happen, but so what? What does that change? If you don't walk down the street for fear of pianos, you don't get to the grocery store or your job and then you die from starving instead of from a piano.