No, not quite. Drunk driving endangers other people's lives
Now you're arguing that the discrimination is
justified, not that it isn't discriminatory. Under your definition, it is discriminatory, whether or not it's justified. But I think under any sensible definition, it is not discriminatory.
Yeah, exactly, like gay marriage. I'm sorry, no matter how you try to word it, outlawing gay marriage is discrimination. You're basically saying, "People are free to pursue happiness, as long as they derive it from the same things as I do." It's very convenient for everyone to be allowed to do the same things, as long as the allowed things happen to be the things you yourself like.
The problem with such a scenario is not that it is discriminatory, but that it is an unjustified infringement of freedom, for
everyone. Even the people who like what I like still have their freedom unacceptably restricted. But there's no
discrimination involved.
You're just grasping at straws here. Of course I accept that sexual behaviour should be restricted. This is my only restriction: sex requires consent. You can do whatever you want, as long as your partner is willing. Any other restriction is arbitrary for obvious reasons. I don't think I need to spell out the difference between consent and lack of consent here.
The notion of consent is itself arbitrary. Why is an 18 year old able to give consent, but a 17 year old not able to? There are certainly some 17 year olds better able to make decisions than other 18 year olds. Yet we
arbitrarly rule that the 18 year olds can give consent, but the 17 year olds cannot. Why is that arbitrary rule about who can and cannot give consent justified?
But it gets worse for your position. In some states, a 17 year old can give consent to have sex with another 17 year old, but not a 37 year old. It isn't even a matter of having drawn lines of who can and cannot give consent, we also draw lines of who they can consent
with. So incest prohibition is not even unique in terms of arbitrary rules about who can consent to sex, and with whom.
So why are such laws justified? Simple, really: age is
correlated with what we really care about (ability to make rational and informed decisions, and accept the consequences), even if imperfectly. But the state is not really capable of evaluating what we would ideally like to know, so we accept this imperfect proxy of age because it's
good enough, and we can't get perfection. We accept the cost of exceptions as being small compared to the benefits of prohibiting minors from consenting to sex and avoiding the problems that burdening the state with more complex determinations would create.
Similarly, incest is
correlated with coercion and a lack of proper consent. The cost of an imperfect proxy is acceptable.
"Hey guyz, I know how to make rape cases easier to arbitrate! Make sex illegal!"
You can't seriously be suggesting this?
Of course not. The cost of such prohibition would be, well, rather extreme, and far outweigh any possible benefits. I'm disappointed that I even have to clarify this point about my position.
But what are the costs of prohibiting incest? Well, they aren't extreme, that's for sure.