No dude. You've repeatedly told me that I was making stuff up when I tell you something makes sense. Hell, you're doing it in the other thread with your argument that Helm is not a human god, when there are only two categories of god, Human and non-human(no other categories can exist as it is a true dichotomy), but it doesn't actually use the word human.
You don't get to now argue that planestouched exist as a category when there is no word planetouched in existence in 5e.
And as I have tried to explain in that thread, you are wrong, there are more than just "human" and "non-human" gods. The lore of the settings themselves hold this up. I have also said I agree with your sense, which is why I homebrewed many of those gods to be explicitly human, it is simply that I recognize that that is not how the settings are written.
But on this, you have shown nothing that would indicate that planetouched are in anyway changed. All it was was the name of a group of races, and that group of races still exists.
There are no racial traits that all "planetouched" in 5e have in 5e that can be linked to "planestouched." They all have darkvision, as do 90% of the other races. It's the most overused racial trait in 5e.
Okay, so you want to claim that they can't be related races because they don't share any racial traits... except darkvision.
What about spellcasting? Aasimar, Tieflings and Genasi all get spellcasting. What about energy resistances? Tieflings, Aasimar and Genasi all have resistance to an energy type. So, these two racial traits seem like they are shared between these groups and that they can be traced back to being "planetouched"
All you have to do is look at the independent planar races to see the difference. Aasimar are a race WITH subraces. Tieflings are a race WITH subraces. Genasi are a race WITH subraces. Clearly they are not one race with a bunch of subraces, or they would have been presented that way.
Do you have any argument other than, "I really want them to be one unified planetouched race" to show that in 5e they are? Or any evidence at all? I have the facts I listed to you. Facts you have yet to be able to counter.
Aren't the new Dragonborn a race with subraces that have subraces? You have Dragonborn, then you can pick between chromatic, metallic and gem, and then within that you can pick from (red, white, blue, green, black), (brass, copper, gold, silver, bronze), (topaz, emerald, amethyst, sapphire, ruby [I think])
Would this make the New Dragonborn not qualify to be a race? Because the races would be Chromatic, Metallic and Gem, while the subraces would be the colors?
Goblinoids are supposedly one race, but the term isn't used in the player's section for Goblins, Hobgoblins and Bugbears, and those three races share no traits between them (except darkvision)
Firbolgs and Goliath are both Giantkin, a category that to my knowledge is not used in the player sections for them either, and they do share a trait with Powerful Build.
So, looking at the other races I see that
1) Subraces having subraces can happen and seems to be acceptable, even if it isn't common
2) Sharing racial traits isn't neccessary to be in a related group
2a) Planetouched do share a set of racial traits however
3) A category being explicitly spelled out in the player's choice section is rare, and usually does not happen.
The example you gave was for half-demons and half-celestials, not Aasimar or Tieflings. Aasimar and Tieflings don't have parents who were fiends or celestials.
And where does it say that they can't? Looking over everything I can find there is nothing that says that the half-mortal child of a Deva couldn't be an aasimar, or that the child of a human and a weak demon coulnd't be a tiefling. Yes, I understand Cambions exist, but they are just more powerful Tielfings.
Yes. It's hard to have a Blood War between demons and evils without having any blood.
Page 286 of the DMG
"EXAMPLE RACE : AASIMAR
Whereas tieflings have fiendish blood in their veins, aasimar are the descendants of celestial beings."
Even gods have blood.
So a poetic name that has no bearing on fact, that's poor evidence.
I also see you quoted something that would prove that Tielflings are the children of fiends and Aasimar the children of Celestials, a thing you just said was false. But sure, we can use this as evidence that at least some fiends and some celestials have blood.