There is nothing luxurious about a manual. That's why Lexus chooses not to offer them for the most part.
If one is the type of person who needs a manual, you're right, they should stay away from Lexus. They should go for Infiniti or BMW--you know, those brands that have successfully combined luxury and some sportiness??? :P
I just don't understand why Lexus can't make a car that can compete with the BMW 3 Series or the Infiniti G37. The IS 250/350 is TINY in the back, the ride is jittery, the engine is a grainy-feeling V6, etc. Toyota really dropped the ball on the IS, IMO.