Because the points are not determined, applied or administered by CT in this case. They are determined by MA insurance law as that is the state that the insurance is in. MA has no "go to class, lose the points" provision.
There are four ways to get points removed in MA:
1. Receive a full dismissal of a ticket in an appeal.
2. Court order.
3.
Appealing material facts of a ticket (location, date, etc) directly to the RMV
4. Become the head of the RMV so you can sweep your offenses under the rug like one certain one did.
Many years ago, I actually used option #3, successfully having an accident completely wiped from my driving record, points and all, because the officer writing the accident report put the wrong TOWN on it; because the intersection listed did not exist in that town, the State Police officer hearing the appeal erased it entirely off my record.
As for MA being "one of 5 states that don't share information" as one other person put it earlier, once again it is a case of people acting as authorities on topics they have no actual knowledge of other than a 8.3 second search on google. All US jurisdictions have shared all data for many years now, and apply their own rules to things that happen in other states. MA in particular is HIGHLY regulated by the State in what they can and can not do, and in what manner. This uniform treatment means that you can't hide from your deeds.