Why not use this product? [radical candor requested]

I recently launched the MVP of LandingPing, a landing page creator tailored for indie hackers that have a product idea but haven't validated it yet.

The value prop is:

• Free for now, will become freemium eventually with usage based tiers
• No code
• Integrated mailing list signup
• Updates sent out to subscribers also appear on landing page as "pings" (kickstarter style)
• The editing limits help the creator avoid wasting time thinking about branding, images, etc and instead focus on conveying their value prop.

My insight is that, from personal experience and that of fellow IHers, we tend to waste a lot of time building shiny landing pages for ideas that haven't even been validated yet. I think this comes from the fact that we are subconsciously comparing our landing page with those of top-tier "startups" like Stripe or MailChimp since the medium is the same and we feel we'll be judged in comparison to those pages. There is some merit to this bias because when we see a landing page our expectations are automatically set very high due to the aforementioned conditioning. By using a blog-style medium instead, you brake the mould and avoid the bias, clearly conveying that this is a page for an idea you're working on, not a finished product.

What I'm asking is to put yourself in the shoes of a creator with a product idea that they want to validate, and tell me why you would pass on using LandingPing to do that. The aim is to figure out what's missing naturally, as I presume that an MVP can't already have reached product-market fit on the first try.