You're arguing to let low information or critical thinking challenged people die because of the actions of others (whether those actions are in good faith or not is immaterial). If Youtube decides it wants to take action to promote the public welfare, that's their right as a business.

"Doing Something" is usually harm reduction within the framework of law and public policy, and there's a lot of harm out there, hence the continual debate over a) should something be done? and b) what can be done?