There will be naysayers. It's not for them.

courage creativity fear

When you do anything of value, there will be naysayers. This doesn't mean there's something inherently wrong with the thing you're doing. It more likely means it's just not for them

That doesn't mean we ignore everything the naysayers say, as there might be some validity in there that can make your thing of value even more valuable. Listen enough to consider whether their critiques are relevant to the needs of the people you're creating for (not the needs of the naysayers). If they are, address the needs for your intended recipients and let the naysayer continue to naysay. 

Creativity, growth, and generous contribution are stifled by pandering to people who don't actually need what you offer. No need to give the naysayer a full seat at the table.