Quality Undervalued preposition???

We have Built time to learn, we have analysed the requirements for the coming sprint/sprints but have we thought about how we are going to work on quality part? A unit test and an end to end test is all what we think before entering a sprint.

Can we discuss Quality Insights when we Built time to Learn???

Eg: How would be define a Good Quality Book?

-Good Quality Pages?

-Good Content

-Good Cover Picture

Or the Big question here is Whole Process???