How to specialize on games?

just was wondering, i keep on seeing people saying they specialize on games like RPGs
which gives them better ratings with this type og a game while worse in others?
does it have to do something with team management and slider adjustment?

No. There is no specializations in genres.

They get better and better because they evolve the needed skills much more then developer with more then one genre.
And they gain more knowledge for the genre/topic combo and what is more important in creating these type of games.
Specilising on few topic/genre could get you down on rating, except you research more techniques vital for these kinda games.
If you develop a new game with the same engine you will probably gain lower ratings, because of no evolving in technology.

It’s just a choice people make for themselves, sticking to what they KNOW they can get decent ratings on.

Probably the best way not to learn what works and don’t work, for other genres.

yeah i sort of suspected this is what “specialization” meant to be… to learn one combo and to stick to it
without actually exploring the other aspects of the game…
tried it once, it was very boring. it took away 80% of the game