"though the "vibe" may be as you say, " it's not a vibe so much as a real characteriztion of the law in the context of the system in which it operates.
There is no such thing as a set of 'hard fast rules' like 'software' which governs us.
It's always going to depend on the quality, characteristic and legitimacy of institutions, among other things.
'The Slippery Slope' can be applied in almost anything and I don't think that it is a reasonable rhetorical posture without more context.
'Written Laws' is not going to really stop anywhere from 'becoming like Texas'