If it wasn't for the computing power/software complexity required, hobbyist 3D printers could probably have been a thing in the 70s or 80s
So many other hobbies feel like they're just excuses to bikeshed or gear collect, or they rapidly become gear collecting hobbies, sometimes leading to some disappointment in yourself when you see the hoard you never use.
Plus, it's repeatable, so you don't have to build daily routines around something irreplaceable. Some people enjoy that, but it doesn't fit well in the high tech mindset where anything that isn't repeatable feels like a liability, especially if managing physical objects and keeping track of your stuff is already a major source of stress.
Files don't wear out either, so it's not like software, where you assume it will likely need maintenance at some point and could stop working in a system update at an inconvenient time.
It also doesn't need much space or expensive equipment, and doesn't take so long to learn that us modern screen addicts would probably just give up before making progress.
That statement completely ignores enormous quantities of engineering that have occurred.
Stepper motors, for example, had huge amounts of engineering thrown at them by disk drive manufacturers in order to get them where we are now.
Resin printers needed high precision galvanometers to direct laser beams. The control of that would have been ridiculous in the 1980s.
Modern resin printers rely on high-resolution monochrome LCD displays. That requires cheap LCDs (only remotely viable after 1990+) as well as enormous quantities of embedded RAM (4K monochrome takes almost 1MiB of RAM which was half the total memory of Powerbook 100, for example).
And modern printers rely on high-power UV LED sources to create uniform flux. Blue+ wavelength LEDs we're a decades long research task.
Revolutionary technologies appear when a series of engineering barriers drop that allow a synthesis of ideas.
The printing press is a good example. Lots of people talk about how the Chinese and the Muslims had the printing press, but that wasn't enough. The printing press needed engineering in paper, inks, moveable type, eyeglasses, an alphabet, etc. before it could take off.