> Also, why not fine or ban products that cause problems rather than requiring certification.
Because certifying upfront is cheaper than trying to find products that cause problems in the field, do lots of testing and find somebody and recall all the other products that are in the field
It seems like fining or banning problems found problems 'in the wild' would require customer troubleshooting to find the cause, manufacturers would lose the product development cost for banned products, and the regulator(s) would have to staff for discovery in the field rather than in the lab. IMO, this seems like it could be more expensive than finding potential problems early.
Because certifying upfront is cheaper than trying to find products that cause problems in the field, do lots of testing and find somebody and recall all the other products that are in the field