Not exactly, I think it's saying that Micron would be better off increasing supply themselves (and thus lowering prices) than waiting for a competitor to come and provide more supply to meet the higher demand.

If there was enough existing competition, that might be the right move, because if they don't increase capacity, a competitor probably would in order to gain more market share. But I think the barrier of entry for making RAM is high enough that Micron can probably get away with keeping supply low (and thus prices high) for at least a few years before a new competitor appears. Assuming demand stays high that long.