if you make a widget that i buy from you then my expectation as the consumer is that it should perform as advertised meaning any feature that i as the consumer have access to can be used unless otherwise spelled out as a warning.
If you squeeze in some feature that i am not supposed to use because it blows up your product and you dont label it appropriately then its not my responsibility as a consumer to figure this out for you. My responsibility ended when i paid you the money. It is yours as the vendor to properly advertise your product and take all the safety precautions needed to minimize issues . Its as simple as that.
Things like XMP/EXPO, performance tunning features, etc should be clearly labeled as warnings that your chip can blow up if thats the case. On the right hand side in the description section, every of those features should state "WARNING - may cause permanent damage to the hardware if enabled" . So that i as the consumer can make that decision - do i wanna risk blowing up my chip for 5% perf? Yes/No.
But no vendor does it and you know why? Because not worth the potential loss in sales due to less than advertised performance, not widespread, and probably requires too much time to proofread (looking at you gigabyte).
So if this person enabled EXPO and blew up his chip....i dont see how thats the consumers fault. Has nothing to do with being new or innovative or being braindead whatever...it is an additional cost/investment with very little return that manufacturers deemed not worth it at your expense as the consumer.