Has been my opinion for a few years now: #complexity is a root cause of many of today's problems in the world.
Complexity prevents individuals aka regular people from understanding things and thus making decisions in their own best interest.
(Large) organisations/companies/states have more resources to handle complexity so complexity tilts the balance of power away from the individual and towards the organisations.
Keeping technology/laws/rules/systems as simple as possible has the benefit of these things being better understood by the average Joe.