Because too many PL clubs follow the German model, only instead of allowing Bayern to dominate and hoping to pick up the scraps, PL clubs are happy to let the rags, Dippers and Arse (and possibly Chelsea) dominate in a similar way.
Our success, and the potential of Newcastle, means fewer scraps for the rest. You can sell domestic and global TV rights because of the rags, dippers, arse etc, and 93:20, centurions and 4-in-a-row, gets us a pass, but our success reduces the chances of another title for the likes of Leicester, Blackburn or Leeds.
The Premier league is run by the clubs. It was formed due to the greed of five clubs. It was never meant to be run for the benefit of English club football.