There's a world of difference between good and great.

Good is at least above some bar of viability: good enough.

Great is actively stand-out in quality.

Good is linear; great is super-linear: an order of magnitude difference.

Often, the amount of work it requires to take something from good to great is also an order of magnitude or more.

But sometimes you have a special, differentiated edge, where it's easier for you to achieve greatness in that particular domain.

Maybe you have the wind at your back (you've caught a rare tailwind).

Maybe you have increasing personal momentum propelling you forward (e.g. a flywheel).

Maybe you just enjoy the work required to get to greatness in that context and so it's "cheaper" for you.

You should spend most of your time on places where you have a sustainable edge on creating greatness.