What’s the real difference between hiring expensive/experience marketers VS someone cheap/new?

How to choose a marketer?Should you go cheap – should you go expensive – tough call right?A few years ago, I hurt my knee.I tried to fix it myself, looked online, went to the physio once or twice, and they said “okay it’sthis”and I went off and tried to fix it, watched YouTube videos, that sort of thing.