No! It's a misconception that the more ball bearings a fishing reel has the better it will be.
The reason is there are different grades of ball bearings. You can buy a fishing reel with 10 ball bearings and it would not be as good as a fishing reel with five ball bearings. If the 10 Ball bearing fishing reel has ball bearings that are just steel chrome ball bearings (which is a very low-grade ball bearing) it would not be as good as a five ball bearing reel where the bearings are made of stainless steel. Another key factor is where the ball bearings are placed inside the reel. If the reel with the five ball bearings are strategically placed the reel will operate properly and smoothly.
The reason companies promote a higher number of ball bearings is more for promotional value. But remember that many high-end reels have a higher amount of bearings and those extra bearings do make the real operate smoother than reels with less ball bearings. The bearings in these high end fishing reels are not only a high-grade of stainless steel but also coated with other corrosion resistant chemicals. These higher grade ball bearings also will be either shielded or completely sealed. Some of the larger reel manufacturers label the type of bearings they put in the real. An example would be a ARB bearings, which means anti-rust bearings. Or CRBB bearings which means corrosion resistant bearings. In a nutshell, you can buy a fishing reel with three stainless steel anti-rust bearings that are shielded or sealed and pay $90 for the fishing reel and the reel lasts a long time. Or buy a $90 fishing reel with eight steel chrome bearings and the reel needs to be replaced in a short period of time.
Now for the best piece of advice. Find a fishing reel that has been made for a long time, that fisherman are still using today and in the same fishing application that you intend to. It's probably a sure bet that you will like it and it will last a very long time.