I really like reading text with variable-width fonts. Gemini requires fixed-width fonts due to its terminal-based approach. Thus, I have no desire to use it ever.

No. There are graphical browser like Lagrange. It is up to you.

I've only dabbled in Gemini so I don't know their names off the top of my head, but I tried out a number of GUI Gemini browsers in the past, and they're quite nice. Easy on the eyes, simple design, all the variable width fonts you could ask for if that's your bag.