figuring out how much it uses in a 5 day work week, or per month or year
In which case you're multiplying by large numbers so it doesn't matter if you start with Joules or kilowatt-hours, so you should start with the SI unit.
Ok even if that is true and they're both equally unintuitive you're the one who wants everyone to switch to an unfamiliar unit for no apparent reason.
The reason is that there is an SI unit for energy, and using the non-standard unit is dumb.
Why does it make so much more sense to talk about solar and electric car charging on the scale seconds of power than hours that everyone should change units?
Because there's an SI unit for energy, and there's nothing superior about kWh, it just adds to the confusion to have multiple different units that all measure the same thing. You get the stupid situation that Americans have with other units where there's teaspoons, tablespoons, cups, gallons, ounces, etc. all for measuring volume instead of just using L for everything.
AIs may never be a real thing. Even if it were somehow theoretically possible for an AI to suddenly come into being if a computer system gets complicated enough, humans would probably do what humans do best and make them extinct. Humans have already killed off massive numbers of species by accident just because they happened to be on the same terrain humans wanted to use: there used to be a forest, humans wanted to grow crops so they destroyed the forest, now a lot of forest species are gone.
Now a new species might emerge on terrain that humans already fully control and consider 100% theirs: computer systems? Humans would just kill it off to get 100% of their computer systems back, rather than having to share them with another entity -- and that's even assuming the humans recognized them as being "alive" in some way.
Only a tiny number of animal species have prospered in the era of humans, and they're the species that humans have domesticated -- in other words, the species that humans have intentionally modified to be calm, dumb and servile. So, maybe a version of AI could survive, but it would have to offer great benefits to humans to make it worth the humans giving up their "land" to it. It certainly won't own the future, it will just be yet another thing that humans modify and shape until it's useful to them.