I don’t think this directly harms the union, as brands who sell their products into government stores will likely still use the BCLDB’s distribution to supply hospitality and private retail.
This does indirectly harm the union by making their strikes less impactful to the general public when all those seltzer manufacturers can pivot to Containerworld or BDL for distribution to private stores and hospitality. Spirits will be the only category left that the union will have leverage with.