What if you'd prefer to be buried next to your husband rather than your parents? Or you move to another state, and that really becomes your home over the next 60 or so years, and you'd prefer to be buried there? Or you want your cremated remains scattered in the Grand Canyon?
I already answered that.
If you decide to be buried elsewhere, it's not a problem. However, this does ensure that you have a place to be buried. This isn't something that you can put off; in fact, the sooner you have a place set aside (yes, even in your 20s or 30s), the better off you are. Like I said, it may seem morbid at the time, but it's the responsible thing to do.
I wrote my will when I was in my early 20s. It was horribly depressing, and I hated doing it. However, it's now done, and I don't have to think about it anymore (unless something changes in my life to where I'd need to tweak it somehow). I can now not have to dwell on it or experience that depressing feeling, because it's finished. Same thing with the grave. I don't have to ponder it anymore or be concerned about it. It's something that I can now put out of my mind and know that it's taken care of.
I agree that having a will (and I do) is an important responsibility. Having a burial plot isn't. You mentioned at least having a place to be buried. Well, I don't think that's going to be an issue. They're not going to stop building cemetaries in the next 50 years, I wouldn't think, so there will always be somewhere.
Plus, for me, the final destination of my earthly body doesn't matter very much, so I'd rather my next-of-kin at the time did whatever they needed to, or whatever was easy for them. Sure, if you have an absolute need to be buried in a particular place, then you shouldn't burden your family with providing that location after you've died, but if not, then it's extra money, effort and paperwork that no-one needed to spend, or spend time on. I feel no burden of responsibility to buy a burial plot.
Unless someone has made their preference pretty clear about their final resting place, I think it's pretty controlling of someone to tell you what they think you should do, which is the message I'd be receiving if I got a gift like this.
And there's far less message-laden investments, if that was their intention.
She didn't say that, but I made what I thought was a logical assumption! Like I said, it's not exactly something you should keep to yourself! The time to let someone know what you want done with your body is usually best before the occasion arises. I would assume most people have let their loved ones know what they think about burial vs cremation vs donation.
And, if the OP isn't in favor of burial, now would be a pretty good time to address it with them. She has the perfect opening - "You know what, Mom and Dad? I really think I want my remains to be jettisoned to Mars instead of burying it!"
The problem with this is that I don't know what I want done with my remains. Like I said, I don't actually care that much. I certainly haven't discussed it with my parents.
And I'm not sure about the OP's case, but my parents aren't my next-of-kin any more. Them attempting to have a hand in that decision would be taking over a role that is my husband's domain.