You might, but the majority does want a subsidized phones. Apple sold in 6 months of subsidized iPhone 3G what they have sold in a whole year before subsidizing.
I do remember SJ saying that the iPhone will switch to Wifi when in range "to save" money or something like that. I think they figured a $20 for a mandatory data plan is not a big deal at that time since the original iPhone had no competition then.
I do agree that the $30 data plan, even though cheaper than the optional $35 one, is still high for those who don't need unlimited access. The problem is that everyone now is doing it and it doesn't seem like it is going away completely (maybe lower price in the future).
If initial cost is not problem for you, you can buy a brand new officially unlocked, without a contract, and unsubsidized iPhone from ebay for $750 include shipping to the US. If every phone manufacturer tried to meet the requirement and desires of every single buyer then we would have 2 billion phone models.
at last count, i think we have 2 billion and 42 cellular phone models. Sometimes standarization is a good thing.