Yeah, I totally get that, but how are there FOSS applications on iOS that aren’t side loaded? At best you can get paid ports/skins of open source software through the app store, but Apple changes developers a small fortune to put apps in the store, which generally equates to no free apps that don’t rely on ads or in-app purchases.
It’s actually a “test things first and have a proper change control process” thing. Doesn’t matter if it’s open source, closed source scummy bullshit or even coded by God: you always test it first before hitting deploy.