asterisk8 said:

SilverWook said:

If they do that, acting in front of green screen shouldn't be any more difficult than doing a stage play in which there's just a couple chairs and a black backdrop.

It is more difficult. A single act of a stage play can go on uninterrupted for more than an hour. This gives an actor a chance to lose himself or herself in a role. Films, on the other hand, have a lot of downtime where an actor must either remain in that emotional state off-camera or be able to return to that state on cue, after hours of sitting in a nice trailer, surrounded by crew, the noises of set construction, snacking, making calls, planning their appearances, etc.

Stage acting also allows significantly more rehearsal time than film acting, which also helps with finding the right tone and delivery for a performance.

That is why film actors have often said they like elaborate sets and location-shooting, because it helps bring the situation to life and maintain that illusion even between takes.

There is that, but cgi and greenscreen are exceptionally lazy, whereas real sets or locations add to the realism where cgi takes you out of the moment and renders it at the level of a bad children's cartoon if not done well.