Default group styles in preferences greyed out

The default group styles in the preferences are greyed out and I’m not able to change anything.
Is this by design or a bug?

I also tried changing from the settings xml but they are sticking to their values.

Dynamo version 2.19.3

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Default group styles cannot be edited - even if you remove them from existence via some very dodgy API use (which I think has since been removed) they don’t actually go away, and come back in this UI the next time you start Dynamo.

I see, do you know what the reasoning behind this is?

I do not, but I do think it would be good to submit a wishlist item to the roadmap as this seems like something that could be possible.