I wish I could say that we had that insight from the beginning and that it worked right away, but we ended up failing into that realization after a lot of designs and prototypes.
So what you describe is somewhat built in to what we have now. Users still have to choose what columns they want to look at (there's no real way for us to guess that) and then we do apply some knowledge on what type of data they're looking at to help them get to what they're likely looking for.
We've also tried at times to make default dashboards for data sources when people connect. We can do this to some extent with known Schemas like connecting GA, SalesForce, Hubspot, etc, but for databases - that's proven to be a largely impossible task so far. Everyone's data is so different, and have such odd conditions to consider filtering by, that the auto dashboards end up being quite useless.