Output on/off

Strange question about output options being on or off.

Wappler 3.9.9 on this particular project.
So I always understood in my mind that output being on or off was just for me to view the output of a step and had little bearing on the final result of a script.
I took a script which has been working fine for about a month, and turned off all the outputs on the steps, in my mind to make it more secure, and secondly because I am going to run it on a schedule, and figured, whats the point of outputting all the results if I will never see them anyway.

If I turn all the outputs on again the script works again, so not a big issue, just wondering why the output needs to be on.