I don't think it's so much protection from DMs. I think that's not really the right way to look at it.
It's about granting the players specific permission to do things. Games that do such, tend I have found to be more popular with players. Games that are rules light and adaptable tend to be more appealing to DMs (or experienced players).
It's not just whether the DM is good or not. It's not having to negotiate at all. Rules give you things to leverage.
If I have to negotiate whether or not I can cast some kind of ritual to turn invisibile then I'm not going to think much beyond that point of uncertainty.
If I absolutely know I am capable of becoming invisible, then I can ask myself "given that I can be invisible how can I use this to my advantaage"
Expertise is similar. Given I have Expertise in Stealth and a very high Dex, I can have reasonable confidence that I can be stealthy (this is actually misplaced but D&D gets away with it anyway because we don't tend to understand probabilty intuitively).
The fact that D&D, especially it's magic system and magic items, tend to give explicit permission is, I think, part of it's popularity.
It's about granting the players specific permission to do things. Games that do such, tend I have found to be more popular with players. Games that are rules light and adaptable tend to be more appealing to DMs (or experienced players).
It's not just whether the DM is good or not. It's not having to negotiate at all. Rules give you things to leverage.
If I have to negotiate whether or not I can cast some kind of ritual to turn invisibile then I'm not going to think much beyond that point of uncertainty.
If I absolutely know I am capable of becoming invisible, then I can ask myself "given that I can be invisible how can I use this to my advantaage"
Expertise is similar. Given I have Expertise in Stealth and a very high Dex, I can have reasonable confidence that I can be stealthy (this is actually misplaced but D&D gets away with it anyway because we don't tend to understand probabilty intuitively).
The fact that D&D, especially it's magic system and magic items, tend to give explicit permission is, I think, part of it's popularity.