If you work in software, you'll spend 6-10+ hours a day interfacing with the machine via your hands.
So of course, the quality of that experience matters. Each person's fingers and typing styles are different to degrees so finding the right fit requires sampling. You often require a few days or even weeks to adjust and get a feel if a keyboard is right for you. I've had keyboards that only surfaced fatigue after a month of use.
I've accumulated keyboards mostly in search of the perfect one that can prevent fatigue, pain, and injury for a job that requires 1/3 of my day to be attached to a keyboard.
I do think ergo keyboards can help a lot when you have RSIs or other physical constraints, but I think 90+% of the people who are MKB enthusiasts could be just as productive interfacing with a computer using a $20 Microsoft OEM keyboard.
I use an Apple magic keyboard for work and I don’t think it really slows me down. I could maybe see if you are a writer and you are outputting thousands of lines a day a good keyboard could make a difference, but if you are writing that many lines of code you should be concerned that LLMs are going to take your job writing boilerplate.
Just give me two monitors, a stock install of Ubuntu, and any $20 keyboard and I can do anything.
I tend to rotate them a few times a month. The hobby is about the gear, but the people that get really deep into it tend to be building them to fit a specific aesthetic - people make custom keycap sets, complete with graphic novelty keys, etc., for all sorts of themes, from food, to anime, to space, and everything in between. And people design the keyboard cases for just as many themes. Mine sit on stands in my office as decoration - I enjoy looking at them the same as I enjoy using them.
I want a keyboard that is ergonomic and pleasant to use.