I found myself wanting something like this the other day trying to query some BigQuery tables I was unfamiliar with.

With that being said, from my vantage, the value of a tool like this is writing the SQL query for me that I can understand, verify, and reuse.

Since it doesn't look you do that, and only return charts or "answers", you're locking users into an analytics solution rather than a tool that provides flexibility to any traditional BI solution.

Perhaps this is explained by a difference in target audience.