I suspect most people using objects in Perl 5 do so because they have some project to finish, not because they want to understand how an object system works
At this point, people who are just getting things done, aren't they likely going to make bad decisions? This is even more likely when you don't understand what you are working with. So they do something stupid and get away with because the effects are not obvious or not crop up that often.
Not understanding what you are working on will eventually come back to bite you in some way or another. Looking at all the software that I have had to work with over the years it has been consistent. Few people bother to understand what they are trying to do and eventually screw it up leaving a mess for someone else to clean up.