The point of the article is that in Canada at least, many people go through with it.

I think the reason people don't end up killing themselves is that actually committing suicide is technically difficult, and terrifying. If one doesn't have access to specific drugs, how does one do it without making a horrible mess that their loved ones would have to clean up?

Even if one can somehow avoid the mess, suicide tells the people who are left behind that one chose death over them; it's a terrible message that most people, justifiably, don't want to send.

A medical decision that leaves little to no trail is a much better outcome for everyone.