That isn't how suicide works.
I know the US is just very bad at this, but you can literally look at other countries and learn from their experiences. I know, some of them don't speak the same language, but it turns out Americans are just human like everybody else.
Interventions _work_ without making suicide impossible, because the suicide victims aren't rational people looking to kill themselves, they are crazy and have fixated on a plan that would kill them. When the plan doesn't work they are reset by that and most won't kill themselves.
The most internationally famous example is Town Gas. Britain used to make a dangerous but useful flammable gas called "Town Gas" by processing coal. The gas burned reasonably cleanly and coal was readily available, but the gas was toxic and so you may have heard the phrase "Stick your head in the oven" - the idea isn't that you could somehow cook your own head, but toxic Town Gas will poison you and you'd die. Britain used to see lots of suicides by this method.
And then, not to prevent suicide but for simple economic reasons having discovered huge natural gas reserves in the North Sea, Britain switched to Natural Gas. Things had to be reconfigured, there are still left-over buildings and equipment littering the country decades later, but it just made obvious economic sense to switch. Natural Gas, however, though technically it could suffocate you, isn't poisonous and is very disinterested in remaining even a poorly ventilated kitchen, it just floats off. So people who lay down with their head in the oven after Natural Gas didn't die. They'd lay there, and eventually they'd realise this isn't working - and they would get up and get on with their lives.
This _actually worked_ entirely by accident, the suicide rate dropped significantly. A natural experiment, and to refuse to learn from that is extremely dense.