I cannot imagine any ideology other than an indefensibly fascistic and authoritarian one, where it would be either illegal or immoral to end one's life. And if it is not, then helping a person to do so would not in general be either, and in fact could often be a highly moral and selfless act. OTOH, there are situations where suicide is an irrational, self-destructive, irreversible choice people make in temporary moments of distress. These might even comprise a majority of suicides, and probably of suicide "attempts".
In these situations, it would be immoral to assist the person to execute such a decision. Whether it should be illegal is another more complicated matter. So, I think those who give such assistance have at least a moral obligation to ensure that the person they are assisting is not making a rash decision in response to some temporary event and has been given all other possible assistance to try and remedy the suffering that is prompting their suicidal desire.
In this light, I am uneasy about something like a rollercoaster of death that would make the process seem not merely without suffering but actually fun, and thus might lower the threshold for such a decision, possibly with some thrill seeking fools riding it with the delusion that they will survive it.