Write more "useless" software
Apple once rejected an app of mine for being "useless". App review even called me to tell me my app is useless and will not be approved to the Mac App Store.<p>~12 years later thousands of people have used that little useless app 
(KeyboardCleanTool, a very small free app to block all keyboard / touch bar input). People have used that app in ways I'd never have imagined (e.g. letting toddlers hack on their keyboards or letting their cats sleep on the laptop).<p>What is useful or not is really subjective.