Due diligence is what a realtor absolutely needs to do on behalf of their clients. They're very aware and do a lot of research to make sure that they understand the environment their clients are purchasing in.
Part of the problem with data mapping is a lack of coordination and cross-country data. That's exactly why one of the solutions needed is the updated flood and risk mapping. A smart climate resilience strategy focuses on protecting existing homeowners while mitigating future risk.
That's where I'll leave it. You're quite right. We don't have enough accurate mapping, and it is changing all the time.