How to subscribe to HBO and get HBO GO on Roku

When we subscribe to HBO we expect to get HBO GO on Roku.
When I had Verizon and subscribed to HBO, I enjoyed HBO GO on Roku.  Now I have Comcast and cannot get HBO GO on Roku.  Hence, Verizon provides a more complete HBO package while Comcast provides an incomplete HBO package.  I get much more HBO from Verizon.  HBO On Demand is very limited and X1 costs more.  I should switch back to Verizon to get more HBO, right?  It is a better value.  This is just common sense.
Why doesn’t Comcast listen to or understand what its customers want?  Why doesn’t Comcast value what its customers want?  This is the essence of customer relationship management.  This should be their most important goal.