Yes. You can opt out of Publisher Pitches entirely in your company settings.

These are different settings. Switching off Publisher Pitches opts your brand out of being available to pitch at all. Turning off Publisher Pitch Activity notifications only quietens the alerts about incoming pitches — by email, in the app, or both — and pitches still arrive.

Leave Publisher Pitches switched on and manage your Publisher Pitch Activity notifications under Profile & settings → Notifications. You can also check Awaiting Acceptance in your dashboard for pitches that still need a decision.