If you have so many accessible properties that you need to generate accessors for them, you may need to re-think your design. Accessors are a code smell.
I'm not sure that I entirely agree with that assertion.
Most OO classes will have a number of properties, but unfortunately Perl's object model does not provide a standard way to define those properties. The simple and common approach is to store properties as keys in a hash but this leads to hard-to-find bugs resulting from typos in hash keys. Generating accessors is an effective way to eliminate that class of error.
I do agree that lots of accessors in the public API of a class is often a problem with the design.
The examples on the page you linked to seem to be written in a language that, unlike Perl, supports both properties and private methods.
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