It's somewhat explained near the end of the article. Sex in bees (and ants) is weird. https://en.wikipedia.org/wiki/Sex-determination_system

Humans use XY system, so we share 50% of your genes with your children, parents and siblings (in average).

Bees and ants use X0 system. A female bee share 50% of your genes with their own daughters, 75% with their mother and 75% with their female parents and 75% with their female siblings (in average).

So, from the bee's genes point of view instead of having their own children it's better to kidnap their mother and force her to have more female children. And a consequence is that instead of running away to form their new family in a safe place it's better to die protecting their mother.