Fibre-To-The-Property: Is BT my only option ?

BT don't have a monopoly on OR FTTP, there are a few alternative providers , but you may find that BT are the 'value' provider of those available.
Sky, Talk Talk etc, could, if they wanted provide service over FTTP in the same way they offer FTTC over OR's kit, but they chose not to...so if you feel that you don't have the choice you should, perhaps you should be speaking to the company(s) you would like to use ,asking them to start offering it, rather than implying BT have in some way limited your choices.
TBH, it always amazes me that given the grief OR get for not providing full fibre connections , that many that have it, complain that they have to use it