Your argument lacks nuance. It comes across as though you are unwilling to accept that we can learn from the mistakes of the past and be more careful this time, because with that attitude you don't have to engage with the specifics of a proposal. It really seems like pointless fearmongering, especially after the article already addressed some of the specific concerns about what might go wrong with introducing GMO chestnuts into the wild. Reminding people of the general concern that making significant changes to a whole ecosystem can have unforeseen consequences doesn't add anything to that conversation.