There is still systemic imbalance and lack of diversity in the workforce that leads to a lack of opportunity for people from marginalised groups. This needs to be fixed systematically. It is especially true in senior roles. There is a large conceptual gap between grassroot advocates and typical corporate diversity training. This is mainly due to corporate diversity training being abstract and not concrete.
The reason Practical Diversity and Inclusion was created was because there was a need for a tool to help aid communication at a concrete level.
The Cognitive gap row is one continuous row that is a boundary between the Abstract and the Concrete rows, signifying the cognitive gap that one has to jump in order to translate abstract language into concrete terms that one can understand.
By talking at the concrete level, you avoid the Cognitive gap and any miscommunications.