Sure, so long as he lives in their home he "has to" abide by their rules but that is a very different statement than he "should" abide by their rules. The choice is up to him, if he wants to keep the animals, he has to submit. If he wants to not go to church then he loses the animals. In the same way that if someone is robbing me, I can choose to keep my life by giving them what they want but it is not a very moral situation.
What rules is the OP making? He is simply stateing a personal preference "I would like to keep snakes and ride bikes without being forced to go to church." In a rational household this would be no problem.
Yeah and only 1/3 of smokers die from lung cancer but this doesnt mean they should smoke. The remaining folks might be able to walk but maybe they could be marathon runners if they never smoked.
Yeah, you were "taught", you weren't "reasoned" into that belief that you have to respect them, they "told" you to and I'd bet they reinforced it in a myriad of ways.