I drive in many European capitals and have had no major issues in Europe. Comparable to that, I find Buenos Aires is more free-wheeling (i.e., haphazard) than any of the European OECD countries' capitals (including Rome) but the drivers in Buenos Aires are also more aware. The "headaches" mostly comes in play during rush hours but you have to be aware at all times.

On net, I minimize my driving in Buenos Aires (Capital Federal) far more than I do in Europe, but that's more for reasons related to the cheapness of cabs and my strong distaste looking for parking (even when free/cheap).

While I wouldn't generally suggest that people drive in Buenos Aires (more than they have to), that's mostly because cabs are cheap there and secondarily because it does take an adjustment for people who are mostly only truly comfortable driving in the US (and Canada) and don't have extensive international driving experience.

[For perspective about where I'm coming from: I'll drive anywhere in Europe (including say Greece) and am perfectly comfortable driving in very busy urban traffic conditions in the US but would generally do whatever I can to avoid driving in say Egypt, India or China.]