Like I already said it's 10 years or so of habit, why change what works?
I understand. And I suppose this may have been a rhetorical question, but if you or someone else is interested in why they did this, here it goes.
It used to work like that:
1. Show Tool Menu = Escape.
2. Inside Tool Menu = 1, 2, 3 etc... to open each tool (not customizable).
Because the most often used tool is the Pointer tool and most people constantly have to switch back to the Pointer tool, they made it easy by allowing you to use the Escape key to select the Pointer tool. When you wanted to switch back to the Pointer tool, you could press Escape twice rapidly, done.
Many users complained that using numbers wasn't easy to memorize (which number is Eraser tool?). Many users also pointed out they wish they could customize the same key commands as they use in other apps. So they created new customizable key commands to select the tools inside the tool menu. And they chose more memorable defaults - while keeping the idea of pressing the Show Tool Menu key command twice:
1. Show Tool Menu = T.
2. Inside Tool Menu = T (Pointer), P (Pencil), E (Eraser), etc.
They made the key commands customizable except for the Pointer Tool since that one is already accessed as Show Menu Tool (P). In the process the "1" functionality to select the Pointer Tool was lost without the ability to customize it back in.
Now I understand that doesn't suit your workflow, and maybe you're not alone, so if enough users request an independent customizable "Pointer Tool" key command, maybe they'll do it? https://www.apple.com/feedback/logic-pro.html