Do you think this happens with you as well?
You get an interesting idea. You get all excited to make the product and brainstorm a lot of things. You create todos, lists and everything on HOW will you build it.
Let's say you plan to validate your idea and you do so, by building a landing page. You do marketing and everything BUT the results are not as you expected / or are very few / not in favor of your idea.
What do you do? Do you still make the product? Does it kills the excitement you had when you thought of building it?