Because they already do everything on your schedule. The downtime for emergency patches always eats away at EU Primetime. The Ilum fix was supposed to be immideate, yet they waited for the US to come out of Primetime and then took the servers offline, cutting into EU Primetime again.
They did the same thing during the Holidays.
The EU Servers are located in Ireland, operated by people who live there. WoW, Rift and others managed to Patch during Off-Peak hours, 2AM on a Wednesday typically.
If there is need for an emergency patch, do it right away, no matter who's Primetime it hits. In the past 47 days since Early Access began, every Patch and every emergency Patch has hit EU harder than US.
Sure, Australia has it worse, but there are no official servers there. EU has official servers, people to operate them and wants to play in Primetime just as much as US players do.
And BW saying that they need to patch everything at the same time for whatever reason (Progression Raid Guilds being direclty comparable or whoknowswhat) just doesn't work for the majority of people.