[Shivetya]

Because for diabetics your diet and changes to can lead to wild swings of your glucose levels and would require much more diligent monitoring, something individually is very hard to do while asleep. Sleeping is not a good time to have a low sugar even and it can happen quickly and you just don't wake up from it.

purely anecdotal but my mother has seen high levels before going to bed only to wake up dangerous low. Or the fun good level and suddenly in the morning you are at 300+. Ask three doctors at hospital and get three different opinions.

No, don't do it at home and don't do it unless monitored by a health care professional who knows how to respond.