I know there are cheaper alternatives, but gaming branded hardware is far from being cheap. Specially middle-high GPUs.
And for most people that want to upgrade their computers or a specific item, they prefer to buy something that will last at between 3 to 5 years.
It's cheaper to fly to America and buy game consoles or PC hardware and fly back than it is to buy them in Brazil. Just be sure to hide your price tags from customs (or have a nice little bribe ready)
A stand, chain lube + cleaner, tubes+tube patch kit, chain brush, floor pump, chain drive tool, cable cutter and a set or two of wrenches/screwdrivers cost you more then a 200/300 euro switch plus at least one 60 euro game?
And you bought these? You didn't inherit all this stuff from your grandparents together with an "Oma fiets" or two when you born?
jokes aside, I do imagine that you might have more specialized tools. specially if you're working with some of the older sport bicycles that need love.
Sure, you can choose to buy a PC... but that's not a requirement (or indeed a preference) for lots of people in the hobby.