It’s interesting how you guys are defining a computer primarily by its hardware. You can have the most sophisticated hardware in the world, but it’s worthless without the appropriate software/OS. Which goes back to the point of this thread, the iPad replacing the laptop (in my case, my MacBook). The hardware of my iPad is superior/more functional than my (admittedly older) MacBook, but limited by iPadOS. Thankfully Apple has let up on its restrictions over the years.
IMHO, the issue is that the iPad, or more specifically, Apple's approach to tablet computing, is very different from how new form factors were introduced to consumers in the past.
My migration from having a desktop be my main computer to a laptop, was easier because in a pinch, I could use my laptop as my desktop by adding a few peripherals. It may not have been as good as a desktop with regard to internal expandability or power, but the ports on my laptop and the fact it used the same OS as my desktop, made it a pretty straight forward transition for my and many other's use case.
With the tablet form factor, the same is largely true if you're going for a Windows, Android, or ChromeOS tablet. Peripherals and services are much more supported by those OSes across form factors. They tried to follow the traditional model of attempting to allow at least some additional level of use of their tablets as a laptop and desktop out of the box.
Not so with Apple's approach to iOS/iPadOS. Their focus on the iPad as a laptop replacement is a fairly recent pitch. It was years after the iPad was released before they came out with the Smart Keyboard. Up until fairly recently, even mouse support was missing. And monitor, browser, and file support are still lacking.
Consequently, many people look at the iPad as not being a computer because it didn't follow the path others took, and Apple isn't helping the situation by confusing customers with their
'What's a Computer?' and then 'Your next laptop will be an iPad' ads.
A friend of mine once told a girl in high school, that she was 110% a woman, but she was no lady. The iPad is a computer, but it's not a laptop or a desktop. Could be a good or bad thing depending what you want, but it's definitely something customers need to understand.