Blockstream has no special control of Bitcoin Core-- except by being the _only_ company in Bitcoin directly contributing to maintaining the infrastructure.
Blockstream provides companies with the most mature, well tested, and secure blockchain technology in production the blockchain original protocol extended via interoperable sidechains along with one of the most experienced teams in the industry.
This is AXA's distillation of the message from Blockstream over several weeks of presentations and complex due diligence. Is their understanding inaccurate?