It wouldn't even work for dishwashers. Which have just one use case, with a few small variations.
Home dishwashers are all the same size with very similar performance, and making different classes of them is pointless. One CPU on the consumer PC market can be
six times larger than the other one, measured in core count.
Dishwashers and all other home electrical appliences have a
true power draw specification, because you need to know what electrical breaker to use and how the appliance loads your whole electric installation in your home and what appliances you can run concurrently. In case of AC units you have also a starting current spec, so that you have all the information about the true requirements of the appliance to be able to run it safely and reliably.
CPUs not only
consume different amount of
energy (one CPU on the consumer PC market can draw 200W or even more than the other one) and you need to take that in consideration while choosing a power supply, you also
need to cool them, coolers are different sizes and some are simply incapadle to work with certain CPUs.
Knowing a true power draw of a CPUs is therefore twice as important than knowing a true power draw of a home appliance.
Efficiency of home appliances is rated and extensively tested: e.g. you test energy consumption and water consumption per washing cycle of some standardised clothes load.
There is really no reason why any computing components should be treated differently than any electric home appliances, why consumers should have less information, why should they be misled and enjoy less consumer protection.
Your PC while gaming can easily draw say 500W, you can run 10 fridges at the same time with this sort of power !!!
TEN FREAKING FRIDGES WITH THOSE COLOURFUL EFFICIENCY LABELS ON THEM, WHICH MANUFACTURES HAVE BEEN TRYING HARD TO MAKE AS GOOD AND EFFICIENT AS POSSIBLE. You can run a heatpump / AC unit for a whole home with the power some PCs consume.
Also, electric home appliances tend to be
optimised and balanced products. Can you imagine how a washing machine would behave it is was set out the box as Intel 14900K, for example? BTW I am not an Intel hater, and have this CPU and I am happy with it, once I adjusted it.