The confusion between you and this guy is that you seem to be talking about "a business idea" and he's simply talking about "an idea for an app, but with no ide

The confusion between you and this guy is that you seem to be talking about "a business idea" and he's simply talking about "an idea for an app, but with no idea behind it for turning it into a business". It doesn't seem like you and he are talking about different things at all.