A million views won't pay the electricity bill
Going viral means a piece of content spreads rapidly beyond its usual audience. That can introduce your business to people who would never otherwise have found it. Lovely stuff.
But views are a measure of attention, not a receipt. Someone might watch your video, laugh, send it to a friend and carry on with their day. They may have no interest whatsoever in what you sell. They might not even know you sell anything.
Organic marketing has a different, longer-term job: help relevant people discover you, give them reasons to trust you and make it easy to take the next step when they're ready.
Viral reach can help with discovery. It just can't do all the other jobs by itself. The internet is not your sales department. It barely remembers your name.