Canada to indefinitely bar mental illness as sole reason for access to euthanasia
(www.theguardian.com)
You're presenting assisted suicide as if it's just a "willy nilly" decision. People don't "just" go to a physician and stick a needle in their arm. It's a long process that involves careful evaluation.
Going "I didn't kill myself and I'm happier for it" doesn't make you the spokesperson of thousands of other people who are still here, suffering, and wishing they weren't here anymore. You aren't in their bodies. You aren't them. They should be able to decide for themselves and if that means suicide, they should be able to do it with dignity, not by jumping in front of a car and messing up multiple lives in the process, or running amok and getting shot by a cop, or jumping from a building and traumatising those around them.
You shouldn't get to make that choice. They should. That's the discussion here.