The headline is a little stupid, but I’m assuming they took 800W or something similar as reference, otherwise they wouldn’t have ended up with over an hour.

3.4 Megajoules is equal to 0.94kWh

If we assume a gaming PC running at 800W (incl monitor), then it would mean slightly over an hour of gaming

To be honest, without going too deep into SW lore, it is entirely reasonable for a given planet to have to import certain goods from elsewhere. Life did not originate on most of the SW planets - they were colonized (at least when humans are concerned). Now, in today’s globalized world trade sanctions can be a debilitating tool, so it’s reasonable to assume that in the SW galaxy the specialization has gone far enough that no single planet can sustain its needs when isolated.

The problem with Naboo specifically was food and exports - it did not grow enough food from what I can remember, and its valuable exports were halted by the Trade Federation. So, in my opinion, it sort of makes sense, especially if we compare it to cough fresher SW writing