All of this is interesting...
Yes you have pulled back the curtain on the wizards secrets and exposed the methods for how this is done.
But in defence, if this was all done from scratch then this story would be still on PD01.
Before you judge, down load the software.. then the characters, then the hair and clothes.. and finally the mansion environment.. Then start rendering.. see how the nuances of the software produce very different results.. There is time.. Dedication and learning involved in achieving the level of render quality you all enjoy.. This is not just throwing characters and clothing into an environment such as you do in the sims..
On a side note:
I wonder if the same arguments will be made when AI becomes the standard??.. There is no originality with AI at all.. Everything a large language model does is based on what a human has already done.... Be careful for what you wish for... and I would suggest take the time to understand the process before critiquing the product. Just my 2 cents..