Basement ceiling

[Folkcafe]

Dodgeaspen

Compare the STC ratings of a non-insulated and an insulated wall and let me know if you wish to revise that statement.

From stcratings.com
Sound absorptive material can be installed inside of a partition's air space to further increase its STC rating. Installing insulation within a wall or floor/ceiling cavity will improve the STC rating by about 4-6 dB, which is clearly noticeable. It is important to note that often times, specialty insulations do not perform any better than standard batt insulation.

While not a ton better than the airspace in between the floor and ceilng layers, every bit of the plan is helpful. Hence a multi-pronged solution. Mass, mechanical isolation and insulation will net you the biggest result.