Battery change in iPhone 4 and iPhone X both Moderately Difficult?

My question is really more rhetorical than asking for a real reason that both the iPhone 4 and iPhone X are shown as being the same degree of difficulty. I just got through changing a battery in an iPhone X. If that was moderate, replacing the battery in the iPhone 4 (Based on the video.) should be described as "Super easy". One has 6 steps. One has over 30, IIRC. Just sayin'...

Maybe it was because at the time, the levels hadn't traveled so far to the upside as they have now? The scales must have changed a lot. And I guess I get that. That said, you guys are definitely a valuable resource, and parts source, and a really big help. Cheers.