The original post said there would be no point. According to that post, doubling it would make a different in "specific situations", thus indicating that there is indeed a point to more RAM. No difference = no point to adding more RAM. Some level of difference = a point/reason to add more RAM. Its so simple.
Still waiting to see where someone said "there would be no point in having 2GB of RAM in any iDevice!" because at this point, it is looking like a made-up quote.
OK, now I see what you mean.
Let me phrase my argument this way: "Apple fanboys tend to state Apple did the right and best thing when only delivering even the latest iDevices with 1GB of RAM"
Again, this argument is technically nonsense. Anyone knowing the battery life of competing 2GB RAM-equipped WP products (the Nokia 1020) know the additional power usage of having to constantly power on an additional 1GB of RAM is negligble and in no way result in vastly inferior battery life. (Again, I purposefully not list 2/3GB Android phones because their OS is far less battery-friendly than either iOS or WP and, consequently, don't represent a battery-wise ideal OS.)
And there isn't a space / volume constraint either - after all, for example the Nexus 7 2013, which has a considerably smaller volume than the Retina iPad Mini / Air, has managed to pack in 2GB of RAM. The volume argument ("2GB of RAM would take far more volume") is also very often cited by Apple fanboys - by the above-cited "gaussian blur" over at DPR as well.
All in all, this is why I consider the argument "1GB is the best compromise
" fanboyish. Because it's simply not true, neither battery life- nor volume-wise.