More that you made the conscious choice to work without pay for 2 years, and you and any dependents didn't starve or end up homeless in the process. That's something few people can do.
Besides that, it's in extremely poor taste to marginalize someone's sacrifice of two years just because you think they're privileged. It's usually better to make much of someone's contributions than to minimize them.
I didn't marginalize it. I said the ability to do it is rare. Those are very different things.
I think it would be great to live in a society where people can do what GP did without going into debt, but that will require bigger structural changes.