they told me that I was wrong and that since He made it, he can control it, which is incorrect. Do you guys have any suggestions on how to explain coins to non-crypto people?
Imagine that you create a club for people to join. When you create the club, you create rules for the club. One of the rules that you create is that the only way any new rule can be created or any existing rule can be changed is if all of the members of the club agree to the modification of the set of rules.
Now imagine that people start joining your club, because it's a really great club to be a part of. After a while, you decide you want a new rule.
You are the creator of the club, does that mean that you can "control" it? No. Everyone that joined the club joined it with the expectation that the rules won't change without their consent. If you tried to create a new rule without consent, everyone would just ignore your new rule and it wouldn't have any effect.
If you want to, you could split off and create a new club with most of the same rules as the original club. If enough people like your new rule, they may become members of both clubs, or they may leave the first club to join the second.
A group of people in the club could all decide together that they like some new rule, but they can't force anyone else in the club to accept that new rule. If they tried to implement the new rule, they'd end up splitting the club into those that still follow the old set of rules and those that follow the new set. Still the original set of rules would exist with members of the original club.
Bitcoin is that club. Satoshi created the club, he made it so that rules about how the club functions must be agreed to by all members of the club. If he wants to change any rule, (such as giving himself bitcoins out of nowhere) then all members of the club would have to agree. If only some members agree, then the blockchain would split into the original Bitcoin, and the new "SatoshiWantsWoBeExtraRichCoin". If you don't want to be a part of the system that makes Satoshi extra rich, you can just continue to run software that adheres to the original rules (along with everyone else that thinks like you).
Or, just have them sit down and watch this video:
https://www.youtube.com/watch?v=bBC-nXj3Ng4It does a great job of explaining it all.