The games industry has almost no old talent. There are many non-trivially-sized game studios where nobody working there is over 30.
Presumably, on the film-industry side, this is in part a work of the unions, acting as barriers-to-entry to the industry and thereby limiting the supply of (⇒ increasing the demand for) their existing membership.
Not knowing much about the history of film, I would guess that film-industry unions — besides the blue-collar labor unions, that likely arose organically just as they did everywhere — originally arose out mostly from the natural limited supply of "famous actors" who thus already formed an implicit power bloc within the industry.
The games industry really doesn't have a natural power bloc equivalent to "famous actors." There are some famous directors, but they just go found their own studios if they don't like working conditions elsewhere (since business/people management is already their comparative advantage.)
https://www.thelightleaks.com/think-pieces/reality-of-unpaid...
> 2. Games market follow a very strong winner takes all model, a few games have all profits, literally thousands games are released yearly that nobody ever heard of or bought.
These are both true of movies, but that is a heavily unionized industry.