End users must be excited about your cool idea. That is what marketing people mean when they say your idea must be compelling. What you propose to the end user (it is different from what you propose to the customer) must prompt the end user to act as you wish (to use your idea as an end user or pay you something as a customer). That is where we get the term "value proposition".
What I mean is this: when pour your new dog food into the bowl, you want to be sure the dog is going to be eager to eat it. Very eager! Not bored. Not saying "Maybe." Instead, very eager to rapidly consume your offering and yell for seconds, and thirds.
That is why it is so important to test your initial ideas on potential end users. A simple chat with ten people will teach you a lot. It will start you on your way to modification and improvement of your offering. After a year of such work, you'll look back and be amazed how much more compelling your cool idea is to the ideal end user (and customer). You are very likely to have significantly shifted your profile of ideal end user and customer by then.
BOTTOM LINE: To get your idea compelling, talk to real people about your cool idea until you find what makes people eager to use it or to send you money. Then you know it is compelling. That is your initial goal: to figure out the profile of the ideal end user and ideal customer (typically not the same person). They are the people who are going to be very eager to get what you are going to offer. When you know that, then you know you have a compelling idea worth doing more work on. That is central to building an unfair competitive advantage. Try it, it's very powerful!