He or maybe she.
Exactly why has a simple question become so complicated? i have asked a simple question?. Why is it that nobody can provide a simple answer.?
It is also because nobody on this forum has the answer. The exchange is owned and operated by Openreach and only they have the answer!
How can me me knowing how many cabinets being upgraded to FTTC compared to how many cabinets being served by my local exchange be seen as senitive information?
You have already been told that and you are now going round in circles. If you have already asked Openreach and they have not told you then the reason for not telling you is their business. They are a private company and do not need to tell you anything.
If you have not asked them,do as you have been advised and email them. You might get a surprise and they might tell you. Who knows until you ask THEM.