Can't complete their games for the foreseeable future, 3 games in the self isolation period, so 9 point deduction for inability to complete games, 3 points a piece to their opponents, and if it continues punt them down the pyramid, can't have a team saying "yeah, we're ready to start playing" only to play a fraction of their scheduled games.
Same thing happened to Bury and Bolton, neither could complete their fixtures so were deducted the points for those games and, in Burys case, punted out of the league entirely for not playing a single game. It's not fair on anyone when you breach lockdown rules then make a half arsed apology statement a couple days later, rules need to be made, so the team that aren't playing because of the opposition's idiocy, aren't being dragged into the dirt as well.