I was also, but now think that I disagree with Reddit's decision. I do not think there's a good argument for it being in the same class of phenomenon as nonconsensual porn.
Here's why:
1. r/deepfake exists, draws novelty, and has appeal in part because it's explicitly identified as fake. It's part of the name. So there's not only any claim to it being real, it's explicitly identified as fake. It's hard to argue how there's any nonconsensual anything when the parties involved in the deepfake porn all agree and understand it's fake.
2. Let's say that someone posts deepfake porn as real porn. Now this is a different issue, one closer to liable. But that's where there's some misattribution of something to the potential victim. The victimization is from the assertion that it is about the individual (as opposed to a deepfake creation, where the opposite is being asserted).
3. Let's say that, out of curiosity, you, in the privacy of your own home, on your own hardware, create deepfake porn involving your spouse (who fully consents and wants you to do so because it's arousing to them) and publicly available imagery. You do not distribute it. By the "nonconsensual porn" logic, though, you have now engaged in something akin to sexual assault, by engaging in nonconsensual photography. But this is absurd, because the public figure has suffered nothing, and nothing was obtained from them without their consent. It's your (and your spouses') creation.
4. Let's take this a step further, and say that a year from now you create software that will create a simulation of a person solely from its knowledge of what humans look like. Let's say that you obtain something that looks like a celebrity. Have you now created nonconsensual photography?
5. Let's say you find a person who is the doppleganger of a celebrity--a dead-ringer lookalike. You film them in porn. (This has been done actually.) Is that nonconsensual porn, because the celebritie's likeness is being used without their consent? The porn actors/actresses consented, though--why is deepfake any different, when there's nothing to consent? Why do you need porn actors/actresses consent to supercede the celebrities whose likeness they resemble?
The logic behind this reddit (and pornhub, etc.) decision is full of holes as far as I'm concerned, and it creates a very dangerous precedent concerning consent. It essentially gives people power over others' likenesses due to their popularity.