I agree, but I think it's just from the general cultural notion that your body is yours and you get to decide what is done with it (which then, ironically, also doesn't apply when cultural norms are different, e.g. afaik you're not allowed to keep your relatives ashes in your home in germany, even if they willed it).

As with many social conventions, it doesn't really make sense (but from what I've seen a lot of ppl do agree with it). But it does highlight how ridiculous some of the arguments against abortion are.