“..Why would you hunt with a 30-30....”
Because compared to many long action bolt actions it is lighter to carry through brush for quick shots and the lever action allows for quick follow up shots without loosing sight picture.
“to carry through brush for quick shots”
That is a perfect reason to use the 30-30. The area I hunt is more wide open with usually long shots.
A 30/30 lever action is a very capable brush gun for deer.