Are bodyweight exercises more demanding and tiresome than weight lifting?
Iv'e been doing both calisthenics and weight lifting for years.
Calisthenics, or body-weight exercises, are more tiresome when it comes willpower, but not more demanding. Body weight exercises are more tiresome because; (1) They take a longer time to complete-For instance, 5x6 Barbell rows will take less time to do than 100 pull ups- And (2) They rely on endurance, which consumes more energy than a few compound movements with weights.
For me, weightlifting is a little more demanding. I don't have to pump myself up in order to go for a sprint or to do some push ups, but I do need to when it comes to lifting heavy ass weights over my head, such as bench press or military press. Also as Kevin Ossia stated, Weights are much more strenuous on your joints and muscles, which is true unless your doing weighted calisthenics-but for the sake of the OP's question we won't include that type of permutation. So to put it shortly:
Weightlifting - Fighting against multiplied gravity, so more demanding.
Calisthenics - Using more mental willpower and endurance, So more tiresome.