Saying yes to everything maxs out your time/energy quickly. Then when a real opportunity comes, you cannot take advantage of it. Say no to some things leads to saying yes to the right thing.
Finding the answer comes from saying I don't know π€·
As experts, it's uncomfortable to say "I don't know". But without this, no-one knows what questions still plague us. Saying "I don't know" opens the door for those with answers to find you