I wondered about this also. Maybe they pulled it temporarily so that their side of the story could get out in circulation. Then they'll reinstate the voice after a while on the grounds that "as we all know, this was developed separately and in advance of any conversations with Scarlett".

If they had kept the voice then it might seem like they were reacting and possibly caught off-guard. Instead, it looks like they're stepping back, assessing the facts, and proceeding with due caution.

Sam Altman statement said they pulled the voice out of respect to Scarlett Johansson.

IMO that's consistent with them trying to look like they're being responsible and considerate (even though they plan to re-release the voice in a short while, after their side of the carefully-planned story is out).

In general, I assume anything a CEO says after a scandal breaks is whatever the crisis management people told him to say.