"It's a major shift in public policy, with wider implications and unintended consequences for all of society that need to be carefully considered."
Ms Joubert said it was impossible to prevent abuse and coercion, no matter how safeguards were written.
"As a society we need to do everything possible to relieve people's suffering and ensure that everyone dies comfortably and with dignity. However, this legislation is not the solution. It's simply too dangerous for society."
Meanwhile, the Anglican Church in Aotearoa New Zealand said Ms Seales' death was a time to acknowledge her courageous determination to give focus to an issue requiring wider debate.
Archbishop Philip Richardson said the church was committed to engaging with the debate, which raised issues of deep significance for humanity.
"Whatever our views, part of Lecretia's legacy will be to refocus this public discussion."
Archbishop Philip said Ms Seales and her family were in his thoughts and prayers.
"For the moment I simply want to acknowledge Lecretia's passing and the loss this is to those who love her most. To them I offer the assurance of the prayers of the Church and our condolences."
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