There are some facts to consider here.
Right now, freight trains are being inconvenienced because Amtrak trains are given TOP priority where they run on freight rails. The freight trains are put on sidings sometimes for hours for fear that Amtrak will be held up at all by freight traffic. Any train cannot run at high speed on existing freight rails because the best of them usually top out at 75 MPH while many in service, even those used all the time, might have slow orders for 40, 25 or even 10 MPH. Broken rails and derailments are common, especially in cold weather. Section crews have plenty to keep them busy just keeping the existing lines and spurs in service for freight use.
Carriers bow to Amtrak wishes now, and it costs them dearly.