That's entirely possible. But consider, 60 or so riders going round a circuit, which should help keep them familiar, essentially because tyey enjoy racing. Compare with 200 pros on a road stage, differing road surfaces including pave, gravelly, concrete with gaps (welcome to Belgium!), changes in road width, up and down, 22 - 25 teams (depends if 8 or 9 riders, generally only GTs have 9) with their agenda. This is usually get the sprinter or GC guy in the front 25 where it's a bit safer. Road max width varies between 8 and 15 riders so overall it's no surprise that pushing and shoving happens, and someone might make a mistake. Different environment, superior bike handling skills (Schlecks, some Souh Americans, and nameless others excluded!), but sometimes things go a bit wrong.
Similar results, different comparison. If you put 60 pros round a circuit, the chance of a fall off would be drastically less than a race full of lower category and relatively inexperienced amateurs. Fair comparison in UK, the Tour Series, 50-60 riders in 5 rider teams, flat out, tight and technical circuits, very few fall offs.