if, in the end, the care industry becomes more powerful than the suicide industry, you'll see the opposite outcome - people subtly coerced into continuing to live through their suffering, rather than left to freely choose to decide to die. religious groups may see that as preferable, but i don't; coercion is coercion, one way or the other.

so, the key thing is to minimize profit.

one thing you could do is mandate that the suicide industry remain a part of the care industry, so that there isn't a financial incentive to push one over the other. further, regulating the prices of care and suicide as services via an insurance monopoly (as exists in canada.) can help take away the profit motive. regulating suicide as less profitable than care could help ensure that these choices are being made by people and not by bureaucrats.

i believe this is the status quo, here - you can only get these services in care facilities that have the option to sell you things that will keep you alive, too. that should remain enforced.