Most reasonable people will not have enough conviction to make a serious amount of money even if they’re right. I think a better question is how much would you have invested to make $500k/ $1mn (or whatever a life changing sum is for you) on the investment then you can consider whether you had the stomach to do that.
By the way, a "Reverse Mode" (calculating the initial stake needed to hit exactly $1M) is actually a brilliant idea.
But to your underlying point - it's the hard truth. People often act like they have infinite time and keep putting decisions off for "later". And then, boom - your peak earning years are behind you, boom - you're 70. This terminal is basically a receipt for that exact kind of procrastination.