Seriously, you do think that we need to know how valve programmers call these functions which responsible for buff mechanics?
There is already a lot of information about this, dispels, purges, strong dispels, silences, mutes, there is a wiki and info available, players who don't want to know it won't know it. And making all tooltips equal to shadow form tooltip is not a great solution, that's why there is an alt button and dota wiki.
No, it's not retarded, there shouldn't be total immunity for everything. Period. It gives zero counterplay and only harms the game (playing LoL? Kayle's ult, even considering the fact that whole gaming community thinks that it's OPed, it still allows you to CC ulted target, asking for a skill that gives you immunity to all abilities is stupid)
And i think it's quite retarded to think that you can dispel everything while there is nothing saying that you dispel everything.