As was noted by
@nfitz your assertion is fundamentally off.
There are no standing heritage buildings on this site; therefore no one is seeking to protect the non-existent.
The concern is over a move to seize the property; rather than working with the City to ensure not only preservation of any archeological artifacts, but also the construction of a long-planned historical interpretation of the First Parliament site; and a desperately needed new Library Branch.
These uses and a proposed subway station are not incompatible uses; therefore the attempt to seize the land draws suspicion about intended future use and cooperation.