Whereas in the US, gun ownership is enshrined in the constitution, so even if gun ownership was a major net negative, it'd still be an issue.
Just like in some countries, complete bank secrecy is a constitutional issue, so even giving the local IRS-equivalent, while demonstrably a net positive for society, becomes a "hot button" issue.
Probably the closest modern issue is being against euthanasia/suicide. It's obviously cruel to force people to suffer, and safety issues aside, it's obvious someone should be able to terminate their life in face of insurmountable suffering. Yet people will object to that on all sorts of grounds.