This sounds weird to me. “The massive production” weakly implies complete confidence that a specific event of massive production will actually occur. “But massive production of nanobots does not require that they be self-replicating,” would be better, or “But massive production of nanobots would not require that they be self-replicating,” as it is hypothetical.
“Massive production” is distracting because of the similarity to “mass production,” so maybe say “extensive production” instead.
This sounds weird to me. “The massive production” weakly implies complete confidence that a specific event of massive production will actually occur. “But massive production of nanobots does not require that they be self-replicating,” would be better, or “But massive production of nanobots would not require that they be self-replicating,” as it is hypothetical.
“Massive production” is distracting because of the similarity to “mass production,” so maybe say “extensive production” instead.
“The production of large numbers of”?