Accuracy and the ability to control the entry of a bait into the water.

Sometime watch, really watch guys on tv casting. Or even better, go to
a wintertime fishing show where a big name angler is tossing a jig into
a cup 50-80 feet away and never missing. Doing it while not making a
lot of noise. Just laying it in there.

Baitcasters are far more useful, and accurate than you give them credit
for. They take practice. Anything worthwhile does.

Carlos