Probably going to have a lot of people disagree with me but…
Profiled bearings DO offer performance enhancements, specifically longer spin times and increased stability. They are not NECESSARY at all, and for the most part any trick that can be done on a profiled bearing can be done on a flat bearing.
Typically, the higher your level of play, the more you’ll notice a difference. A majority of top level competitive players use profiled bearings for good reasons.
Some people would recommend avoiding profiled bearings when you’re starting out yoyoing, believing that they make your play sloppy, because you have been “pampered”. I don’t necessarily agree with this, as I don’t see there really being any difference in how you learn on a profiled vs. a flat bearing.
Feel free to try both. You might find that you prefer a flat bearing, and you might find that you prefer a profiled bearing.