The work in progress (WIP) concept originated in the Lean manufacturing movement. In both a financial and operational sense WIP is considered a form of waste.
Trunk-based development has strong support in the DevOps community as it streamlines merging, reduces WIP, and reduces cognitive load.
Many teams use limits to reduce WIP and its associated waste and cognitive load.
Arguing that WIP limits are good because they reduce cognitive load and stress might not play well with stakeholders.