The landing page is the worst place to get in touch with the reality of the product. Take a STEAM store page, it says nothing interesting about the game, doesn’t even has a gameplay video. Much better to just get to know the product with real people with real stories to tell, then the landing page is just the last place you go to acquire it. I never understood people who actually reads marketing copy and goes “hmm interesting”, it’s so vacuous and boring.

If you don't have any connections to vouch for you/your product, you need a perfect landing page to get those first few users who will then recommend.