George Patterson wrote:

Wear a dust mask. They took talc out of sheet rock compound because of health
concerns over people breathing the dust.

They still put talc in drywall. What they are careful now about is making
sure it's not contaminated with asbestos (much mined talc contains it).

NIOSH recommends a mask anyhow. Just about any of the silicate's dust
is bad to breath in quantity.