There's a lot of problems bees (both honey bee and native bees) are facing. There's varroa mite, a virus spread by mites, pesticides, pollution, habitat loss, monoculture... a lot of stuff. However, healthy bees are more resilient, so healthy hive is much more likely to shrug off a event that could be "the straw that broke the camels back" for a weakened malnourished hive.