People laugh when i say,"i dont know how it's going to make money"

i had an idea once, still have it. so, i did the obvious thing, i talked to bunch of people about it. they listened and then they asked, ok! tell me how you going to make money off of it? i pondered and said, "i have no clue." everybody said don't bother, what's the point of doing it. i always though if one were to make good product and it appeals to mass, money will just come. it becomes secondary in a way. Am i delusional in thinking this?