One of my four hobbies.
(this is why I probably only build scale stuff!).
Having several hobbies allows my to use talents from one hobby to hone my skills in the another hobby.
For me, it also keeps me from getting 'burned out' on one hobby.
As a kid, I was into both trains and planes.
At the turn of the 20th century: men who thought 'big' were engineers and went into construction: bridges, sky scrapers, railroads, etc.
A hundred years ago, railroads were what the web is today: the leading edge and the place to be: it connected people and places.
The railroads turned a wilderness into a developed country.