Both systems work for those with "untrained thumbs", it 's a matter of degree ( how much braking you set ), instead of getting cocky or over rating your ability in trying to control THE BEAST by setting it low set in on the highest and work your way down through the braking power of the system as you train the thumb, there 's nothing wrong by doing so, you ain 't gonna win sissy status if you set your brakes at the highest setting, better one time pale than a thousand times blushed.
There you are with your brand new baitcaster which you have never fished before, full of confidence ( actually you are full of it ), you exhude testosterone, your manhood at peak level; macho man does something stoopid like not setting properly the tension, sets the brakes low because macho man thinks that he gonna "tame" the beast ( yeah high testosterone levels cause that effect ), makes a cast and zzzzzzzzz !!!! hums the reel as the lines jumps from the spool flowing through every single nook and cranny the reel has : ........
So the fine line that separates you from looking and feeling like an idiot staring at that motherlord of tangled line on the palm of your hand and a nice cast where all the loose line is in the water is a called thing respect for the beast.
The beast can never be tamed, it can only be controlled, it 's there waiting patiently for you to do something stoopid to pounce on you.
Raul, You are almost poetic in your description of the new baitcaster owner. My health has improved enough over the last few months that I am now able to do a bit of fishing after a couple of years off, and I am having to spend quite a bit of time re-educating my thumb. A few hours, over several days, in the back yard practicing has made a big difference-but I'm a long way from what I was when I fished a couple of days a week. Casting a crank in open water is not that big a deal, but casting or pitching tight to cover is another story. :-[
All of my reels have magnetic brakes, and I find them very easy to adjust according to conditions. I have used shimano reels with centrifugal brakes, and find them easy to use as well. As Raul says, starting with more brakes (magnetic, or centrifugal), and cautiuosly backing off will save you a lot of grief.
I have been reminded that I get in trouble with professional overruns most often when I try to do just a little too much,e.g. trying to throw too light of lure on a windy day or really reaching back for a little extra distance.