Exactly and it is not easy for those giants to make such stunts ,because in many cases they are broken their body parts.
There are tons of accidents behind the scene that people watching in TV don't know.
These Wrestlers are actors and making their best to satisfy the viewer and if we think that they are fooling us?no its not because they are skilled in their own ways.
The same as the movies and television series that we watch, they are performers and they're good. Remember that "The Rock" became an actor with several movies and he was discovered through wrestling. Because they are not adopting a new set of talent, they have already the talent to act and give good performance to their fans and viewers, live or not.
And also once the Basketball Legends Dennis Rodman enter Wrestling for a while,and Dave "Batista" bautista a former wrestler that portray 'Drax' in Avengers movies.
They are all actor who risks their health and lives just to make people enjoy watching.