Syndrome specifically mentioned selling his tech to foreign countries in a military context first, with the "everyone will be super" part only coming after he has moved on and retired from the fame and glory that being a superhero brought him, per his own admission.
He's not making everyone super out of some noble idealistic cause of empowering the average man, he's only making everyone "super" to destroy the idea of being super after he himself had gotten bored with it. He doesn't give a shit about other people being super, he just wants "being super" to not mean anything anymore once he's done with it.
"See? Now you respect me, because I'm a threat. That's the way it works. Turns out there are lots of people, whole countries, that want respect, and will pay through the nose to get it. How do you think I got rich? I invented weapons, and now I have a weapon that only I can defeat, and when I unleash it..."
"I'll be a bigger hero than you EVER were. [...] Oh, I'm real. Real enough to defeat you! And I did it without your precious gifts, your oh-so-special powers. I'll give them heroics. I'll give them the most spectacular heroics anyone's ever seen! And when I'm old and I've had my fun, I'll sell my inventions so that everyone can be superheroes. Everyone can be super! And when everyone's super... no one will be."