They are that they way for a reason. Legacy copper infrastructure only offers so much bandwidth, and customers would rather have most of that bandwidth be for download.

"Most" is fine. I'm not talking about "most" as the issue.

And I'm not talking about copper either. Legacy coax is the main problem. Because it has components on the wire enforcing upload/download splits that weren't designed for modern internet service. If it was installed today (and both upload and download were openly advertised, if necessary), then it wouldn't have such an asymmetric layout. It's not customer demand limiting upload to 10-20mbps. In theory this will get fixed over time, but I want more pressure on implementing the fixes.