Have a look for a “Snap To” setting in your control panel mouse properties and if not enabled give it a try it. The mouse pointer will locate on the default button for any dialog you launch. While it may not be the option you want it’s probably much closer than you would otherwise be.
I’ve used this option for years and wonder how many kilometres of mousing it’s saved. When using other peoples machines I often find it’s not enabled and, once through the adjustment phase, they like it. Give it some time as if you are not used to it the mouse pointer leaping to meet opening dialogs can be a little strange!