I agree with the points you make, I myself personally do not use MMS but I do know people who us it regularly. I just think when you look at the omission of MMS and then look at what you get from tariff wise with the phone (e.g. limited SMS but unlimited data) It seems like the packages are built around trying to get you to use the most out of the facilities on the phone.
I wouldn't say my view is on of a geek per se, I just understand how simple it is to set-up and use an email client, due to my line of work, as I'm sure a vast majority who buy the phone will also do.
I'd also go out on a limb and say the people that buy the phone and are disappointed with what it cannot do are more than likely to of bought in to it for the whole 'I have an Iphone image' and not done any real homework on the handset it's self.
It still is a silly mistake on there part (Apple's) seeing as I'd imagine they will want as broad a market share as possible but the lack of MMS will cost it sales.