What's worse, damage from lead or damage from constant obsession about lead?

Damage from lead. The 'obsession' here is that the right level of lead in any product should be ZERO. There should be international pacts, like what was done for gases destroying the ozone layer, to remove lead entirely from products

This raises the interesting point of finding a balance between knowing/searching and letting go when it comes to health. Lead is a major one but obession about health can lead to anxiety, stress. I think that finding the major factors that affect health is what matters (sunlight, sleep, walking, cooking with stainless steel, etc.) and letting go of all the minor details. This is an issue that has been close to my heart for years, and my perspective on it has changed over time. Anxiety can be a real problem.

At some point you're bound to reach the point of diminishing returns

Damage from lead.

Lead is actually dangerous. Arguably the panic from things which are .. much less well evidenced, shall we say, causes people to overlook the real problems.