Because of the statements that are in relation to WA Ay...? The databook is saying
current LCM Ay is relative to the Yellow Flash and Ay's statement is clearly implying that he's only the fastest cause Minato isn't around. Also tbh I wouldn't be surprised if Ay didn't get that much faster (strength is irrelevant to the argument) since
he compared his top speed back then to his top speed now, likening Naruto's feat to Minato's in the past.
Yeah no, Ay never compared his Top speed back then to his top speed Now. He only said
“you only the second to have ever outrun my fastest punch”. Minato dodging his top speed in their very first encounter when we know that they continue to clash with each other many times after that very incident does not mean his top speed remained constant and never changed.
Minato even said the next time we meet, we will be fighting as kages.
Raikage goes on to say they fought several times after their first encounter. Meaning they most likely fought as kages. With Kage Minato still being faster than his top speed as a kage. Hence him saying Minato was the only one faster than him when he was alive. However, that was 16 years ago.
When Ay was using V1 in the fight against Team Taka, his V1 mode was started to be on par with the Yellow Flash. However, Note the statement “there is still” because we will call back to it. Later on as the fight progressed and Sasuke used MS, then we see AY ramped up his LCM form again, this stage is called the V2, in this state his chakra is at Biju level. He never used this the first time he fought Minato. Unless you want to say Jonin A4 who fought Minato has Biju-level chakra, but I digress.
Further evidence, notice his hair is not spiking up as much in this fight. Suggesting he possibly didn't have the V2 at this age.
Those statements were for V1 Raikage
The Data book statement does not cap Raikage V2 to be only relative to the yellow flash. It says specifically,
“It could overtake even naruto in his tailed beast charkra mode and it boasts a god-like speed, not inferior even to the Yellow Flash"
Notice it says over take Naruto in KCM then it showed there earlier interactions when he was in V1, however later when he used V2 he was blitzed by Naruto Top speed.
Meaning
KCM naruto top speed > Adult V2 Raikage top speed> Adult V1 Raikage top speed ~ KCM Naruto regular speed ~ Yellow Flash > Jonin Raikage top speed
Also I'm fine with V2 Ay's Lariat being relative to Jonin Minato, but the Lariat DB statement is about the technique in general, which was used by V1 Bee/V1 Ay primarily.
Again this is what I have a problem with, Double lariat does not have a Static Ap and Speed. That scan was making reference to the Double lariat that Adult Raikage in V1 and Samehada enhanced 8 tail cloaked Bee used against Kisame. You have to be relative in strength and speed to use double lariat, which would make Adult V1 Raikage ~ Enhanced 8-tail cloaked Bee at that moment.
Even young bee and Ay can use Double lariat. This double lariat can not be the same speed and strength as the one used against kisame, even Ay had to tone down his own strength any time they used it when much younger.