Because you can't bullshit 12 10mg pills but you when someone gives you 120mg of methadone liquid you have to take their word for it.
At one point i was taking 38 10mg pills of methadone a day. Sometimes i miss methadone. It made me sleep soundly and made me appreciate food in a way I never had. I've never been a big eater, but i really enjoyed food while on methadone.