While true, this is insufficient to make the new claim credible. If the proposed satellites only weighed 100kg and remain on orbit for 3 years, to keep a million up requires:

  (150 metric tons/100kg) = 1500 satellites per Starship launch
  1e6/1500 = 666 launches per MTBF (3 years)
  666/(3 years) = 222 Starship launches/year

This is significantly higher than even the current cadence of Falcons.

If the proposed satellites are to be 1 ton, the required launch cadence would be ten times higher.