You can't precision move by dragging with the mouse.
I don't often need to delete a text frame "while I'm editing text" 🙄, but I do often need to delete, or move, or copy or blanket apply a style to a text frame while I click on the border of a text frame.
Bottom line is, it's not intuitive, because clicking on the border is a purposeful action. It's not easy to aim for the middle of the text frame (to start editing) and accidentally click on the border. There's a reason why this is how this kind of objects behave in all other publishing/word processing tools. You click on the border of a "text box" in Word, you can start to operate it with your keyboard. You click on the border of a text frame in InDesign, you can start to operate it with your keyboard. I don't see there's ANY POINT debating this.