Then these arguments would support a At least (Low-End), possibly (High-End) interpretation if I'm not wrong, since it depends on the context?
Aside from context, my argument is
that both SS and WoTL are generally the whole dimensions, it's a clear panel from Kisuke, the most knowledgeable character in the verse and the smartest, SS and WoTL arent planets there, and
they are the dimensions that are contained/surrounded by Garganta
It's clearly written on the dimensions in that scan "SS" and "WoTL"
So yeah that's my point, it's clear in the mange, what AKM has provided for his stance is some statements that in certain contexts refer to planets, which no one disagrees with actually, but my point is that it's only when it's supported by a planetary context, not in general because Kisuke has literally drawn them as the whole dimensions + supported by CFYOW statement that if they could be likened to planets ~> they aren't planets.
in those same scans that I posted there are no stars around meaning each dimension there have its own stars, so looking at what AKM provided to prove that the context in the movie talks about the planets only I found only 3 pieces of evidence from him:
"A town from the WotL suddeny appeared above the Seireitei"
"A town from the universe" would never make sense in this context, it's counterintuitive. Universe is very expansive and town is very specific. It's obvious they are talking about "a town from Earth". A clear cut example of WotL referring to Earth only. And this is from Memories of Nobody, which is related to Senna's feat.
This doesn't really mean anything, in fact, he is just misinterpreting the context behind it.
I can say it means "a town from that/the other dimension" and it's completely fine, using dimension instead of WoTL here doesn't break the meaning.
"World of the Living is being visible from the Soul Society"
As the above context makes it clear,
only Earth was being visible in the sky of Soul Society planet. Once again, a direct example where WotL refers to Earth and SS refers to planet.
Actually, if we are going to interpret this statement literally, I only see some buildings in that lens being visible in SS, are we going now to say that WoTL refers to those buildings?
In fact, I sometimes use my camera in certain angles, and times and see some far places in other countries using it and I do say hey look XYZ country is visible to me, That doesn't mean my camera showed me the whole country lmao.
The only evidence he brought that could really mean what he wants is this:
"The Valley of Screams has connected WotL and SS. There is no way a tunnel connecting two hoshi can be created naturally."
Toshiro uses the word hoshi, which can either mean planet or star. Here it is translated as star. But we know from above context that he was talking about planets. (Hoshi is not a generic term for any celestial body. The term for celestial body or heavenly body is tentai.)
But sadly it doesn't mean that because we already know Dangai doesn't connect 2 planets,
it connects the 2 dimensions as it is clearly shown by Yoruichi here.
So you got 2 options here actually:
1) Toshiro contradicts Kisuke and Yoruichi, who are btw, far more knowledgeable than him in this matter.
2) Or Toshiro was only trying to make it easier for Ichigo to understand, and he didn't really mean it literally, you need evidence for this interpretation? sure, when Tokinada tried to explain to Aura what Kyogoku is he also said "if WoTL and SS could be likened to planets", so yes, they put the example of planets sometimes when they try to dumb the explanation down for a character.