Well look, the people at helper-scripts, they have done the legwork, often as groups, the probably that you even COULD do a better installation section is already very unlikely .. no more than that it's implausible. These people are more dedicated, they started earlier and they're already done, you are not going to do a better job than them, even if you tried, by the time you did, which realistically, unless you're doing linux for money, you probably won't even finish, but even then by the time you've re-invented the entire wheel, they will have progressed further, and there is more of them than there is of you, you will NEVER catch up.

But listen, I hear you, I hear your paranoia, your belief that there are bad people out there out to get you. Well I'm sorry but I have to tell you, those people simply do not care enough to break in to helper-scripts. Even if they did they'd get found out. It hasn't even happenned yet even though the effort has been a huge success of people just like you coming together and dealing to put an end to the endless linux bullshiterry and making things actually work.

The odds that someone will manage to infiltrate without anyone figuring it out are so low that they are in fact insignificant.

Unless you have the resources of multiple militaries at your disposal, there is simply NO justification from trying to do your own helper-scripts, by yourself and then keep them for yourself. None, it's mental illness to even attempt.