Greetings @Christopher25321881xb6a,
I appreciate you bringing this to my attention. I have tested this functionality on my end using versions 29.8.2 and 30.0, and both operate identically in Outline mode. When you utilize the Selection tool and create a marquee that solely encompasses the center point of the object you wish to select, Illustrator should only highlight that specific object. If the marquee captures the center points of several items, Illustrator will select all those whose center points are within the marquee.
If your experience is different, providing a brief screen recording of your workflow would greatly assist me in understanding what is occurring on your system. You might also consider manually resetting your Illustrator preferences and testing the functionality again. Ref: https://adobe.ly/3LP3lT5 and this video may also be beneficial https://adobe.ly/4i7Q6c9
Please share your observations, so I can investigate further.
Abhishek