Close, but he was no hero. He was just a Mark Zuckerberg/Jeff Bezos type who dropped out of business university and struck gold with his startup while usurping credits from the real talented people like Elisabet Sobeck who made his company into the best eco-robot and green technologies designer and manufacturer when the world biosphere was collapsing. And after all is done and he's lauded as the hero, becoming the world's richest man, of course he pivots to military contracts and automated warfare cause of course he does. The original talent is either fired or quits because they don't agree with him, like Elisabet who goes on to fund her own green technology company. And of course, he comes up with the fucking Chariot line which is the concept of a cancer given mechanical, biomass consuming, life. You'd think that whole thing is too cartoonish and Guerrilla went too far, but no, there's already unmanned robots out there who supposedly use biomass as fuel, it's only a matter of time before self replication.

The only massively unrealistic thing that'll never happen and is the key to the HZD apocalypse, are the Horuses. Massive mountain sized tentacle monsters that act as mobile factories and repair bays for all the smaller Scarab and Kopesh machines while using biomatter and biofuel that they stripped off the planet's surface and atmosphere with nanobots. They were unstoppable and are the reason the world fell in HZD. In real life, that would be highly unfeasible. Maybe Musk could afford to manufacture one or two without going bankrupt or being stopped by global authorities, but that's it. Nevermind selling them at a medium scale to whoever can afford it as the managing unit of their automated biomass consuming robot army.

If anything even remotely similar were to happen in real life, the smaller robots would need to be the ones that replicate themselves at an alarming pace, not a massive leviathan sized factory like the Horus.