How do you know what the point of Zillow is?

Look at where it gets it's income from: "Zillow makes money primarily through advertising services, especially its Premier Agent program for real estate agents..." (AI overview) Those advertising properties for sale or rent don't want them also making the agent's job harder.

Posting accurate data is 100% defensible in court.

Historical data is accurate. Flood projections based on assumptions are educated guesses. I have found the noise data that is included in the options one can view as sometimes inaccurate. Posting what the FEMA flood map shows is accurate data, even if they too can get it wrong. If you are getting a mortgage, where you are relative to a flood plain is critical info to know, as it will cost you more, unless of course, as we did, you provide an elevation certificate that demonstrates the structure itself is out of the floodplain.

IP