"Please express some opinions on why you don't give bottle calves all they want."
Because their Rumen is not working at such a young age.
A calf is born with an esophageal groove, which consists of muscular folds from the reticulorumen that come together to by–pass the rumen, reticulum and omasum through to the abomasum when the calf drinks milk. The suckling reflex (reason I do not like pails)the milk protein and the antisapation of being fed (reason I told you to feed at the same time everyday) stimulate the groove to open. Milk off tempature will upset the grove.
If you feed to much the abomasum will fill up and the milk will spill over into the rumen, reticulum and omasum sections. Since the rumen action is not working the milk is stuck there and will sour making the calf sick and scour.
It is a lot more complicated than this because their are things like the milk clot that forms normally but we are getting into details way more than his forum.
Just bottle feed the calf and do not let it have any water for a short while after the milk feeding.
Are you feeding whole milk or replacer.