Originally I had hoped that Oda did mention that DFs have some kind of radiation that I totally forgotton about. I'm glad that this is all hypothetical because to me, even though it is a fun thought, it is quite flawed.
I think it was clear that VP said that DFs are the result of people's hopes/wishes. As long as people want something enough a DF will materialize to cover that but I do think it is possible that someone or some people in the past might have had a hand in this. That said, I'd counter argue that DFs tasting bad is actually
natural rather than unnatural because so many fruits (and veggies) we currently eat around the world are the result of people meddling in the genetics before people even knew what genetics was. After many years of artificial selection, the humble banana is what it is today. Originally it was disgusting, full of bigass seeds. Same with many melons. Humans made these fruits taste good to humans. Otherwise, they just taste good to whatever eats them.
I respect that you are making theories but now it seems like you are just adding more personal theories to your theory to try to make it work and that's fine but there is no real evidence. I mean so now Radiation is soul which is subtle energy? What else could it be? Apologies if this sounds harsh but I'm a subjective person.
This I get. There are a lot of similarities between the motherflame and nuclear reactors which have radiation. But even if there are similarities, it actually opens up a lot more questions than it hypothetically answers. Questions like, when Chopper ate his DF in the wild, did someone fire Uranus nearby to produce the radiation that is supposedly in the fruit and does this mean that Uranus has been used more often without anyone knowing and causing sea level rise? Or maybe you were talking about a single event or group of events that happened in a sandboxed amount of time such as the void century? So let's say this is what happened, Uranus went off many times in those hundred years or whatever and boom a bunch of fruits got irradiated and became DFs, why would they still be irradiated? Radiation dissipate over time. I guess if we are really talking physics and chemistry (which Oda is probably not going to delve too deep into) then we can say some stuff can be irradiated for tens of thousands of years if I remember my classes correctly. But then let's say Chopper dies and his DF is reborn somewhere. Are you suggesting that this new iteration of Chopper's fruit inherited the radiation because it goes back to the question, how can it be irradiated? Even if radiation can last in a fruit centuries...I don't think if you ate some of the fruit and if there were seeds that would sprout a whole new plant that is just as irradiated without an outside factor providing more radiation. It may be irradiated still but it will be further diluted with every subsequent generation. But these are ifs. Obviously DF's don't have seeds that people can just use to just grow more DFs.
I'm not saying DFs are definitively not irradiated but I do think the most likely DFs that
can be irradiated might be Momo's fruit which was created by VP and Smiles which are created by Ceasar using SAD. Take a look at this:
https://onepiece.fandom.com/wiki/SAD. You can see that the SAD tank has some kind of nuclear symbol on it as stated by the wiki. This stuff probably has radiation in it. SAD is definitely created by people and I'm sure Ceasar learned a lot from VP's supposedly failed fruit. If VP used some radiation to make Momo's fruit then it can be assumed that Ceasar might have discovered the same technique(s). Fruits growing on trees however...unless that tree has radiation or a radiating event happened nearby, it doesn't make a whole lot of sense for it to be irradiated with your given ideas. I doubt a bunch of lunarians 900 years ago used the flames on their backs to add radiation day and night to turn fruits into DFs. That just seems comical. Imagine a bunch of people that looks like King just standing around with flames on their backs and an apple is above it, hanging from a tree. Pretty funny looking scene in my head. Like hey bro, you've been boiling this apple all day, I get it, we're hourly and you want some overtime but hey man I'm here to take over for 3rd shift, the supervisor is asking that you go home now.