In the morning, I woke up with this in mind.
It is common that you to be challenged with this question "are you building a painkiller or vitamin"? You may feel guilty if you can't tell or you're sure it's not a painkiller.
I think we have to be clear about what type of business you're pursuing, is any top brand/product you use today a painkiller (eg. Tesla)? Most of them are not, they are just good products that make your life better. IMO, there are not a lot of pains that deserve a new product, painkillers are usually small urgent care, and most of the time, they won't go really "big".
Building a painkiller is great, but you don't need to feel guilty if it is not. A product could "fail" but it has to have a vision in it. What do you think?