This is a disappointing attitude. Iâm sorry.
We arenât talking about file managers here. I donât do file management in terminal, thereâs no use arguing with Kresmir on this point - heâs a very different animal in this regard. There are rumours that his terminal is set to Egyptian Heiroglyphics just for fun 
But I do love that using Dolphin I can do a mouse gesture (or hit F4) and use a terminal command to do things - it works better than having a million options in the menuâs.
When my sonâs teacher sends PDFâs for us to âprint out, write the answers, then upload photosâ what I do is to download the PDF, open the location in Dolphin, hit F4 and type âpdftoppm file.pdf file.png -pngâ.
So Kresmir is correct in preferring terminal, and youâre correct for preferring GUI - but NOT if you exclude terminal.
Terminal-centric doesnât really mean terminal over GUI, but it does point out that systems like Ubuntu trying to eradicate use of terminal in favour of GUI just make life very hard in many respects.
For installing software I do have pamac and bauh.
I found Bauh to look good, but itâs annoying because it needs a while just to warm up and get going - and Iâm not patient.
As for deciding what software to choose, I tend to do that via web browser and find information - browsing GUIâs for this is really sucky.
When I know what I need (like qalculate-qt or qalculate-gtk) then thereâs virtually no difference in difficulty in popping up a terminal and typing âqalculateâ or popping up pamac and typing âqalculateâ. Given the two options, I probably go less than 5% with the GUI
If a task is no harder to do in a terminal than in a GUI, then it is better to use the terminal.
Both yay and paru are amazing, I use paru a little more often now (often using alias commands anyway, so if I type âinstallâ it is currently âparuâ but if I type âpurgeâ itâs still âyay -Rnsâ).
Look at ways to improve history management and search in your terminal - that helps.