Problem with that reasoning Damage is that everything about these kinds of situations are assumptions we use based on
our real life standards.
If a character destroys a planet that has 10x more gravity than "earth" (Let's say planet Vegeta), do we assume that it's much larger than Earth?
No, we apply our RL standards because we don't know if it's bigger or not since this is a fictional world.
The entire basis of cloud to ground lighting replies on assumptions too. We assume 2000 meters based on
our real life standards. Why should we? The clouds might be double that or even half that since this is a fictional world with 10x gravity. (I don't know how gravity affects cloud height nor do I care, the point is the same)
We assume 2k meters for Kirin. Who knows, it might only be 500 meters.
Why then, should we not use our same RL standards to judge lighting techniques as lighting speed when we do so for various other modes of fiction? Raiton shows all the necessary properties (4 in fact) and is the same for
every individual
And once and for all, I want to stop this idea that "
Raiton properties can be different from user to user to user despite me not having any proof of this and despite there being much evidence to the contrary"

Are we all just going to conveniently forget that you need to oscillate your chakra at high frequencies in order to generate Raiton? Why then would the Raiton show different properties when the process of forming them in the first place is the exact same for every user?
When you rub your hands together rapidly, do you expect to generate ice?
No. You expect to generate heat.
What do you think plants are producing when they undergo Photosynthesis? Fire?
No. Every single plant that undergoes photosynthesis, produces glucose and oxygen. You learn this in fifth grade (in America at least which is as far back as I care to remember)
Why would Raiton have different properties when the process of forming it is the same across every single user?
Hint: it's not.
Therefore, the Raiton properties that a user shows in a particular situation applies to every Raiton user. It literally depends on the situation is they decide to utilize a specific aspect of their Raiton or not.
Additionally, the scaling of speed for the characters still fits in when we use
our real life standards for average lighting speed. In fact, there's isn't any number or variable as to how much superior natural lighting is to Raiton in the first place. It's been measured to be over 4 times faster than our RL standards based on other assumptions using, again,
our real life standards. Hence, the assumption using our RL standards.
Why assume a magical bolt of lighting you summon by saying "Abra Cadabra" travels at
our real life standards of cloud-to-ground lighting speed? It shows all the properties and so we go with that assumption.
That's it.