I probably shouldn't engage you because everything you're saying is complete and utter ignorant nonsense but I'll try...

There's a free developer account option and has been for a very very long time. It has limits but the kid already has the option you are asking for as does literally everybody. If you want to learn how to make and to be able to sideload an app as a dev to your device, that is free now.

Non profits get the fee waived. They don't have to pay it up front either. They have to apply. But again, if you can't get your users to pay $100 you should rethink if you should destroy the ecosystem for everyone else for something nobody wants.

Your malicious apps comment also makes it clear that you do not know any people older than 12.

My parents will likely be affected by this and they are relatively with it with respect to technology compared to most.

People will install malicious apps accidentally or unknowingly and Epic Games' store or the Tik Tok ten cent app store will likely be rife with those apps that people will assume are safe because they were promised a safe ecosystem that you are trying to ruin to get things that already exist!

The privacy and safety of the App store is unparalleled and it is literally the thing we pay extra for our phones to have.

You want to destroy that for unfounded reasons.