Stupid question about the legality of Steam Gift extensions

Why morally wrong ?
The only reason I see is the GA description, and I don't know for the other extensions but ESGST displays it if there's one.

Any other reason ?

technically you're saving half of the clicks you'd normally have to make which means it takes you half the time to use all your points which would give you an advantage over people not using an extension

Doesn't matter, since there's a point restriction anyways. The rule is there to prevent users from using automated process which either enters giveaways without them being there (which means you enter as soon as your points are recharged at all times) or I guess something extreme like a one-click "enter everything" script or whatever.

But at the same time it's really just a time management extension

Exactly. It doesn't necessary give you an edge over other users - just reduced efforts necessary, and therefore time. You still have to be there and click through giveaways - Quoting Mully; "legally" right, but potentially morally wrong depending on your opinion.