Let me expand, as I usually deal with surveys and population feedback. There's loud feedback, and there's statistically significant feedback.
People who want a headphone jack are very loud. They will interject this issue into every feedback opportunity given. They will mention it on the comment sections, forums, q&a sessions, answer their surveys accordingly, etc. That's all fine and their prerogative.
However, when you look at the statistics. They are unfortunately a very tiny minority of the entire population. They are not statistically significant for decision making. They don't have the volume to move sales significantly. This sucks, of course, and I personally wouldn't mind the return of headphone jacks, smaller phones and bigger batteries as a fair trade for thicker phones.
But unfortunately, the vast majority of the market is pre-occupied with other things. The phone screen is too small, the phone weights too much, the phone is too thick, I want to bring my phone to the pool without fear of it breaking, etc. They are not as passionate about it, not like the headphone people are, but they far outnumber them in several orders of magnitude. In the end, if the product doesn't sell, it won't matter how much it was worth to a single passionate person. It will sink the company if it doesn't have mass appeal. Making phones is already an extremely expensive endeavor.
