If at any point I see any evidence or warning that the products I purchase from Amazon cause any material amount of risk to my person or property, I'll reevaluate. In fact, there definitely are some things that I prefer to buy outside of Amazon for such reasons, like climbing gear or medicine.
But as for stuff like chargers, I've had more experience that the easily-frayed genuine Apple Lightning cables, or the classic exploding Samsung phones, are more of an electrical fire risk than anything I've bought from Amazon, counterfeit or not.
For chargers, I've had some seriously laptop-destroying ones. For phone voltages (ignoring fast charging), it isn't that big of a deal, but USB-C PD laptop chargers I am extremely hesitant to buy on Amazon.
Almost every memory card that isn't Samsung EVO PLUS I've received has been counterfeit.
Yet. When one burns down your house, you'll care.
Most people try to head off possibilities like that, rather can just shrug their shoulders and say, "But I saved three dollars!"