You can make the test super easy or super hard to obtain but once you have a license you are on the air either way.
I said it CAN turn into CB on steroids. It doesn't have to if the rules are enforced.
Lack of enforcement of rules is more important than testing in my opinion.
Things are not as simple as we may like them to be.
There are always going to be people of grown-up years who maintain the behavior
of sociopathic adolescents. Little we can do about that outside of more observance of
behavior in schools, better parenting, working toward dealing with poverty and so forth.
The real problems are what behaviors interfere with ordinary social functioning and what are the reasonable limits of what can be done in terms of enforcement.
Rudeness, obscenity and the like on the ham bands are, however irritating to some of us, are not a serious social problem. Kind of like dealing with passers-by treading on your lawn. Not big enough a problem to call out SWAT.
I would separate the functions of testing from enforcement. Testing has the goals of encouraging learning via simple motivational techniques, circulating a useful basic knowledge base, connecting citizens with other compatible citizens, connecting citizens with well-intended and generally benign government agencies with a view to improving respect among agencies and citizens, etc.
Enforcement has the goals of limiting the most serious kinds of anti-social behavior and encouraging respect for the law among those who don't understand how a democratic society works or who are intellectually limited or emotionally troubled.
Most people, liberal or conservative, who think highly of democratic values, tend to believe that more freedom is preferable to the goal of enforcing "perfect" behavior among the many.