Aside from what others have mentioned - maintenance/upgradability. I own a home in Costa Rica, which is basically all concrete. Try upgrading your building with Cat6 ethernet when you have concrete (vs wood/sheetrock).
Bosch also sells those huge ass drills here that take a few minutes to make a 2-3 cm hole through concrete to pass those conduits between floors/rooms. They're not available in the Americas?
Drywall is common in north america. It's ~1.25m×2.5m×1cm sheets of gypsum sandwiched between a heavy paper, and plaster is only used to bridge the seams. It's almost always screwed down, and adds significant rigidity to a stick-framed wall. Cement walls are often (but not always) finished by stick-framing a false wall and then screwing the drywall to that.
I've built three houses in the USA. I don't use conduit everywhere, but have always installed some in places where I think I might want something in the future. I've never regretted it.
Most useful was from my attic (not livable space) up in the trusses to my basement utility room. When I convinced a local WISP to use my roof for a back haul and access for the neighborhood it saved them (and me) from running wires all over the outside of my house and was a quick, clean install.
Conduit is common in commercial work here, but almost never in residential.
