Anything KDE-related, it seems to me, makes you download a lot of other software that you don’t really need, and so I’d like to go another route if possible (not dissing KDE, it’s just not for me!).
Are you sure these aren’t just dependencies? That’s the way of linux, do one thing, do it well. Since KDE uses qt, you likely need to install the libraries and a few other packages it might rely on.
If it really is a bunch of stuff you don’t need, make sure you have “install recommended” disabled in whatever package manager you’ve got. I learned that the hard way when I installed texmaker and it tried to install 10GB of packages.
Raspberry pi was founded as a cheap accessible computer that schools with few resources could afford. $25 boards, or if you had big bucks $35. With the intention the price would stay like that with improving technology. They broke this model with the rpi4 and have only gone up in price.