Yes can be the irresponsible answer
Saying yes to everything creates hidden queues, missed promises, and resentment. Saying no clearly protects the commitments that already exist.
The useful signal is usually already there.
Career systems are still systems. Pull out evidence and everything gets harder to debug.
Offer the constraint and the option
A useful no explains the limiting factor and gives a path: later date, smaller version, different owner, or explicit tradeoff.
Clear options make the tradeoff visible.
Do not make people infer priority
If everything sounds urgent, the loudest request wins. Push priority decisions back into the open where the team can choose.
Flip the switches and watch the story turn into a tiny operating model.
Boundaries are coordination tools
A clear no is not anti-team. It is how a team keeps promises in the real world.