Why is calisthenics perceived as inferior compared to lifting weights?

By asking this question, I mean traning with exercises : dips, pull ups, push ups, handstand push ups / bar dips and progressively increasing the resistance by adding weight to them.

Obviously, legs cannot be done without squatting.

Apart from that, why is doing weighted dips worse than bench pressing?

Not being able afford any trainer to point out my flaws and also not wanting to get an injury out of inexperience, I feel safer doing +30kg dips than 80kg bench press.