Scarcity mindset is essential to adopt when you consider your own time and attention. Defend them and let nothing steal them. They are not abundant. They are limited. Defend them!
Abundance mindset is the idea that there is lots of money, work, and opportunity for all. This is probably true. But it is not true with respect to your time and focus.
Any “opportunity” that might steal any level of focus from the important tasks in your life should be viewed with caution and the default answer should be “no” when responding to most requests.