If cheaper is the name of the tablet game then get an android unless one is looking for iPadOS and if that is the case try the refurbished store.I don’t believe your points are valid regarding transport at all. And I don’t think the dated design matters honestly. The only reasons to opt for the Mini is if you want something smaller and lighter in your hands. Otherwise I think most people are better off with the larger and cheaper iPad that will do everything just as well and be $200 cheaper.
Imagine this two children sitting side-by-side, one has a 10.2” iPad 9th gen the other a mini 6. For $200 more or if smart about it there are many discounts available so let’s say best case $150 more the child with the 10.2” knows their parents decided on an affordable gift/product compared to the child who received the mini 6 and about the only thing that affordable option has is a larger screen of 1.9” difference but everything else with the exception of CenterStage is outdated including the lack of stereo landscape speakers. You get a non-laminated screen, heavier device, etc etc. The child with the mini 6 puts the device in their cargo pocket and is ready to go the child with the 10.2” iPad reaches for their backpack then off their go.
The child with the 10.2” device knows it’s not new tech as the shell looks the same even though their parents say it’s the new iPad for the very reason people put cases or care about showing off their new designed phones. People perception of themselves in society means a lot, if you don’t want to accept it that is fine but the market says otherwise. A child cares what their peers think of them it’s nature.