When you have to move forward with backward compatibility thats the best you can hope for
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Are you delusional? You put "poor people who want to get into music" and "iPhone" in the same sentence. Literally EVERYTHING is cheaper to get into making music than an iPhone, especially the latest model. Your argument is flawed.
My MIDI controller works over BT, and I have a 3$ ebay BT>3.5mm dongle to connect all my devices to my cheapzy 1980s JVC HiFi tower. It's a century old standard, get over it.
Oh wow. If you have money for the 5.5" iPhone, then you can afford a crossplatform crossgeneration interface like this:
http://www.apogeedigital.com/products/duet
there are more, and there are cheaper.
actually, anything serious for performing calls for an audio interface. any engineer will shudder if they need to pull an unbalanced connection from stage to their board across the venue...
seriously, the more you talk about it the less sense you make.