Lots of technical answers here, but the reality is wireless providers had better lobbying with politicians.
In the early days of the internet, there was political will to make internet access as equal as possible to not let companies and rich people buy up a disproportionate amount of bandwidth and squash competition.
Wireless internet came later and the wireless companies lobbied hard to not get lumped in with ISPs when it came to regulation. And still to this day, they get to play by different rules.
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