It's just the fear of the unknown. Currently the TV companies pay them X billion for the TV deals and they handle all the promotion, advertising, marketing for the PL so they don't have to do it themselves. If they suddenly decide to start PL Game Pass then they have to have their own pundits, TV studios, preview programs, TV channel etc. It easy to just have an auction for TV rights and then take in the money. It's a risk to try to do it yourself. However in today's world it's not as hard as you think and the potential revenue stream is enormous. It will happen eventually but if I owned a PL club I would be pushing for it now.