Comment by yndoendo

Building and growing trust makes the data less worthless to the point of being useful. More people will opt-in when they trust the company / the developer(s). Opt-in without a push, universally trust building in the community, keeps leading to this worthless data.

The only way I see moving forward would be community driven effort to build the trust through said means and or other ideas. This not an easy problem to solve and would take time.

*Even the USA agencies like the CDC and FBI must utilize bias data for the decision making since not all states and organizations self-report.