There are multiple ways one might commit suicide, it is true. But some are more reliable than others; some leave a terrible mess for someone (perhaps a family member) to clean up; some are more painful than others; some may put other people at risk. The worst outcome is when a person tries to kill themselves and ends up alive but in an even worse condition.

For people who don't have religious prohibitions on suicide, having a reliable, simple, low cost, low-pain, low-mess option sounds great to me.

Yes, someone who is paralyzed from their neck down can easily take their own life, of course. Don't see any issue here.

You have to excuse the sarcasm, but if you really can't think of any cases where taking your own life in a dignified manner is not actually possible, then I'm not sure there's any discussion to be had here

Sometimes legal frameworks are inhumane, immoral, cruel, and ought to be loopholed. I can think of at least 5 examples right now.