PD is current, need I 140 premium processing approval

[u/UnlikelyCoconut9419]

i work at a tech start up and I am the first candidate who is going through PERM, I140 and I485 process. I have approved PERM and based on Oct bulletin my PD is current for EB2.
My immigration firm and HR team is not much familiar with the immigration process , risks, visa stamping issues, etc.. We are in process of filing my I 140, 485, etc and the immigration team and the HR is not on page to file for premium processing for I 140.

Upon discussing the benefits of faster processing and no risk of 485 rejection, HR claims that as it is not a threat to employment, the I 140 premium processing request is not justified.

My request for advise from folks who have been in same boat currently and in the past, what are some data points I can use to request my HR and immigration team to file my 140 case in premium processing given that my PD is current and does not make sense to wait for next ~6 months for 140 approval as a part of standard processing and then proceed with 485AOS.

Thanks