It’s clutter. Anyone who wants to edit the names of stuff will ask if they can’t work it out for themselves.
For reference: Cities: Skylines has over 1 million players and doesn’t have a pencil icon next to names (which are editable by clicking them). Every few months someone posts a question asking how to edit names, it’s no big deal.
When it comes to UI, less is more.
Compare the simplified UI mockups in my last comment to the current game UI shown below:
Not only is the window changing size for each tab, but there’s also way too much info being shown.