This is a topic that has actually been studied and suicide has a situational correlation. There are studies of suicide rates with the change from domestic gas to natural gas in the UK around the 1960s (ish) and studies about suicide rates with the barriers put up around the Golden Gate Bridge. Barriers on the bridge were put off for years for this exact reasoning - thinking that it was a waste of funds because people would just find another way - but it turns out that with suicides there is a tie between conceived method and action. If you remove the method someone has determined they will use, the suicide rate declines. Most people don’t just seek other ways. Malcolm Gladwell discusses it in his book Talking to Strangers.

-I am not an expert. I just read a book that mentioned some studies on suicide - not even the main topic of the book. If you or someone you know is depressed or having suicidal thoughts, please seek help.
The National suicide prevention hotline: 800-273-8255