there is a little more, like that these matorans did not just decide to try and harness the power of lightning, just for the heck of it. Instead there was a strange figure who inspired them to try and do this. This figure was a disguised Ekimu, who wanted to test out the free will and sentience of his creations.
The seventh city was also not just experimenting with the power of lightning, after harnessing it's power, they started to experiment with the other elements, creating masks of power, runes that was stored with elemental energy that could be used in powering different devices and even boost an individual's elemental powers and more. It's because of this rapid advance, however, that things started to go south and which lead to Makuta and Ekimu's battle which ended with both being imprisoned by the elemental lords.
An idea that i got after this, was that the different matorans in the current day and age of Artakha, has different views on the remaining technological relics that they still find. Like the Earth matorans having a sort of Luddite mindset, destroying the relics and forbidding anyone from studying them (just imagine what this would mean for someone like Nuparu) were as the Fire matorans would actually want to get their hands on any of those relics, with the reason being that they want to learn how they work in order to futher protect themself against a possible Ice matoran attack (the Ice matorans have a similar mindset towards the relics.)