In article , Sacha
writes

It's well-known that swarming bees are much less likely to sting
because their particular objective is to gather round the queen. It's
their driving force at that time, so obstacles in their path are more
likely to be disregarded.

And usually, they have gorged on honey prior to leaving the hive (if
managed bees) - which makes them much more laid back.

--
regards andyw