You are correct. There is a form of undercutting that happens.
But in business you have to take steps to curb these risks.
Greenhouse Seeds, for instance, exclusively feminized their Super Lemon Haze to keep hold of their market share for exactly that reason. DNA and other big names follow the same path.
They didn't complain to others, they took action.
This market is going to continue to evolve and get more cluttered with competition, and no-one is responsible for your success or failure except you.