Have you looked at an x-ray or disassembly video of an iPhone? There isn't a lot of empty space in there.
And what have Google and Samsung won by people having to buy a USB-C adapter, most likely for them? They also removed the headphone jack, and have never had a proprietary adapter standard to replace them.
Google, Samsung, and Apple all have lucrative wireless earphone businesses, or would like to. Simpler design with less components is also a win for them.
I’d pay quite a sum for such a service. The value of a lossless, universally compatible port is hard to overstate. At the very least they could give us a second USB-C port on top-end phones.
And what have Google and Samsung won by people having to buy a USB-C adapter, most likely for them? They also removed the headphone jack, and have never had a proprietary adapter standard to replace them.