This is a tangled web and will get worse as time goes on. Remember some FNs are stakeholders in fish farms, either through partial ownership or because the farms are significant employers in their territory. Some FN are opposed to the farms, but others support them. No government will take action that impacts businesses and employment without serious consideration. The optics are bad when their actions directly cause lost jobs.
The other big factor here is the balance with the greens. Horgan is showing signs of a more relaxed approach to LNG, if he puts that into action and allows the project to go ahead in Howe Sound, then he'll need a trade item to appease Weaver & Co. Something newsworthy like a clampdown or shutdown of fish farms could be just the ticket. It would play well with the Lower Rainland voters.