Why do good products fail to convert users?

I’ve been thinking about this a lot recently.

Some products are genuinely well-built, have solid features, and still struggle to grow.

From what I’ve seen, the issue is often not the product itself — but how it’s communicated.

Things like:
• Unclear messaging
• Weak positioning
• Not highlighting the core value quickly

Curious to hear from other founders and product folks here:

👉 What do you think is the #1 reason users don’t convert on otherwise good products?

Would love to hear real experiences.