recently launched a product i knew was great, people who have bought it sing its praises, 0 negative feedback. sales were not terrible, but they were about 10x

recently launched a product i knew was great, people who have bought it sing its praises, 0 negative feedback. sales were not terrible, but they were about 10x worse than I was hoping for. I took the "focus on the product, customers will come" aphorism a bit too literally. Marketing does not magically happen yet it's easy to ignore. Obviously i knew this but it took experiencing it myself to fully believe it. Hard lesson.