Why is it so difficult allocate journeys if you do not have a person record?

I understand it is easy to allocate a journey to employees based on an action like Hire or Termination.

But why is it so difficult to allocate journeys if you do not have a person record?

I have a requirement to create a journey (containing an embedded application task) and bulk assign it to all employee in a specific legal employer. The journey will then help the employees to update their family and emergency contacts.

I have created my journey and eligibility profile. The journey is ready to be assigned to the employees. It seems like there are only two options in Filtered Lists and Nudges. Isn't there an easier way?