This might be true if everyone everywhere had good clean wall power. But since they don't, light bulbs, even LED bulbs, continue to be be a consumable object. The early claims of 50,000 hours never happened. They're down to claiming 10,000 hours and even this is only if you have perfect power. LED bulbs, at least in my apartment, actually last a shorter amount of time than halogen bulbs.

At least halogens and incandescents were just a bit of glass and some wire. LED bulbs all have a circuit board with many components. If they're taking the place of incandescent and still being a consumable item it might be worse for the environment in the long run. At least incandescents using lots of power puts all the CO2 production in centralized locations that can be mitigated. LEDs environmental footprint is much more distributed.

I'm not against LEDs light bulbs. I replaced almost all of mine with LEDs (though I have a stockpile of halogens for some uses). But they're certainly not going to change the world. Light bulbs remain consumable items.