I think a bit of common sense needs to come into the argument about the use of key or tool.
With regards to the lid or door then a wagobox is the same as a ceiling rose. They can both be opened without a tool or key and if installed CORRECTLY then no live parts are accessible. ie no live core can be touched.
From my understanding of what you are saying is that the Wago connectors can be twisted off or levers lifted etc etc. How far can a regulation cover stupidity? If people want to expose an obvious live part then they will. I mentioned the ceiling rose earlier, the live parts cannot be exposed without the use of a tool unless someone really wants to ie causing damage.
This makes ceiling roses with regards to the regs the same as Wago JB's. ie live parts can be exposed without use of a tool. Yet ceiling roses are fitted and used without any issues regarding compliance with the BRB.