Yes, and being born into society doesn't create any moral obligation to those who gave birth to you. Children should not be involuntary slaves to their parents.
> People who lived before us created a system where rights are protected and, when you reach the age of majority, you have the option of participating in governance either by voting, or running for office or other political action (this is all assuming you live in a Western style democratic republic).
Being able to participate in governance through voting does not negate the fact that being bound by the vote's decision is something that is forced upon you, and isn't imposed on you by consent. You either agree to the vote's result or you are forcibly jailed or executed if caught deviating from what was agreed by the voting system imposed on you.
> I am not sure where you get the idea that you are being violently coerced into living in civilized society and thereby following the pre-existing laws, simply because you never signed a contract or, equivalently, expressly consenting that you would.
If you don't follow the law and you are caught, you will be forcibly jailed or executed, or some other punishment inflicted upon you by force. It's a fact that law is upheld by force, and the vote that created the law is imposed on you by force. You have no choice whether or not to be bound by the vote's decision. You never consented to be bound by it.
> Contracts are a legal convenience.
This is self-evidently false. Individuals may make agreements between them without any involvement of a 3rd party.
> A convenience whos very enforcement is dictated by the laws that you rail against for not having explicitly agreed to them. A bit of a chicken and egg problem, wouldn't you agree?
Enforcing agreements does not necessitate a State enforcing them.
> What is your alternative to expecting people to live by certain rules that their ancestors through their previous political action put in place?
To live by rules that I consented to, and not to initiate force on another individual except in self-defense.