Withdraw of H1B application in RFE stage

Hi Saurabh
Is it a good idea to withdraw the application if we are not able to respond to the RFE with the client letter.
My attorney is saying that the chance is 50-50.Please suggest.
What are the pros and cons of denial vs withdraw

If you withdraw, then you are done w/ the fiscal year. No money is refunded. If you submit response to RFE, then it may be approved or denied based on the response.

So the former has 100% denial, while the latter has a non-zero chances of approval.