Thanks for your reply.
Sorry for the confusion and wrong use of terms.

I am not sure if it was an billing concern but i think it's related to time constraints.
They want to GO-Live in the earliest time.

So they want to import data on the mentioned table and not use hr profile.
Is it a must to use HR Profile while accessing HR Services?
If we are to disable the OOB to automatically create HR Profile when users access HR Services?
Would that be okay? Will it have implications on the HR subscription?
We are weighing the advantages and disadvantages of using only the core table as is.

Thanks!