Text objects, especially those in neovim which are powered by treesitter, are much more precise than a mouse in a coding context. I can simply select a function, a block scope, a variable assignment, etc.
I use Emacs and occasionally paredit-mode for Lisp structured editing, so I know what you mean.
However, typing a few keys on the keyboard is still not as fast or as automatic as moving the mouse pointer to where your eyes are looking, IF your hand is already on the mouse (such as when scrolling around the code). Of course, if you have to move your hand from the keyboard to the mouse (such as when actively editing), the opposite is usually true.
