Iterate faster than you gain users

You can indeed have a great product experience but a poor service experience. I don't recommend that, but it happens, right? But in areas like business and banking software, where trust and brand are key influencers on why people bring their money to you, you can't afford to "fake it until you make it" for a long time. You must design, iterate, scale, and improve your product and service faster than most startups. Unlike in some ads where what you see isn't always what you get, you can't afford to spend millions on advertising a product that could make people lose their money, because all it takes is two failed transactions and one poor context of customer service to get a negative label that might impact your brand, the company, (and its associates) for a long time, and a chain reaction of churn over time.