What can you be good at?
On TGstation, only the MRP ruleset includes a provision about "staying in your lane", and this does not prevent you from knowing everything.
Doppler is a roleplaying server, which means that an individual character should be realistic in their ability. It's natural that an individual has strengths and weaknesses.
The question is, how do we define these within the game?
Paths
Heavy Roleplay - Light Mechanics
What does it look like?