Sigh...my intention was to fully steer clear from this thread but it has now become such a pain in the ass.
On the topic of why type 3 concepts shouldn't be HGR, my understanding of it is because of type 3 concepts whose nature isn't elaborated upon. What i mean by this is type 3 concepts that are affected by the alteration of their object an example being destruction of the object destroying the concept too or objects that can't be altered by the alteration of it's concept, in other words the object defining the concept an example being concepts based on perception.
In this case though, the source cannot be affected by any alteration to it's object be it the body, mind or soul and is described as being a fundamental aspect of existence that makes people what they are.
In the first place going by the definition of HGR which is the regeneration from complete destruction of the body, mind, soul along with one more fundamental aspect of their existence. The very definition of HGR coupled with the definition of the source already qualifies it for the standard beyond any shadow of a doubt.
Moving on, viewing this from an angle of how it affects site standards as stated by
@afzofah this is creating Mid-godly regen that cannot be negated by High-godly regeneration negation as these characters are capable of regenerating from the destruction of all their aspects. So you destroy type 1/2 concepts, so what? Theses concepts mean absolutely nothing to their existence in the first place so if you think about it clearly it's easy to see how redundant this is.
In light of how this actually affects site standards, allow me to digress and move to the issue of the source being a type 3 concept in the first place.
All sources are equal in nature being one and the same meaning you can't have one source being type 3 and another being type 1/2 which brings us to this conundrum, how do we treat the God's?
The definition of the source has it as being the fundamental aspect that makes/defines what something is. God's are Type 1 Concepts, so what has effectively been created here is a type 3 concept that makes a type 1 concept what it is governing and defining its existence, in other words, a type 3 concept being superior to a type 1 concept and realizing this now actually makes me roar with laughter but I'll leave it to the people who created this mess to sort it out themselves.
While still on the topic of Gods, they are undoubtedly type 1 concepts. Regenerating their bodies in the first place should've been High-godly from the onset. It's confirmed that <Ingal> by passes the need for a mind, soul in it's entirety thus if a god were to use <Ingal> it's High-godly regeneration for them as they're regenerating a type 1 concept and regenerating from source destruction is even harder than that if not outright considered impossible by some. Thus with the nature of all sources being one and the same, the issue of needing to prove regenerating it being as difficult as regenerating type 1/2 concepts is settled already.
Furthermore, some of the characters who are able to regenerate their source do it after it's been conceptually erased by type 1 concepts. I mean Anahem and Averneyu are the Yogiiri Takatou of MG who control death, the end & destruction and these characters are able to say "no **** you" to these concepts with others like graham not giving a **** if they've been erased and simply carry on existing, Venuzdonoa being able to say "no **** you" to itself and Anos destruction not caring about these things and continues to remain an absolute Giga Chad at the top of the food chain.
To end things off, if it wasn't obvious already, the reasons behind this entire thing is stupid and I obviously disagree.