If you can fill out the rest of the forms, then the I-765 is no problem. if you're truly "not good" then get help.
even if beneficiary has no plans to get a job, how about:
a) Want a SSN for bank accounts / loans / health care / etc. etc.? Hard or impossible to get without worth authorization.
b) Want a driver's license? EAD can be very helpful.
c) Want to help your friend's business? Paint the house you own & rent out? technically, might need an EAD.
d) Bored and want to start working part time for a hobby? Need an EAD.
e) Want to be prepared in case petitioner loses their job and you have to work? EAD also needed.
It's reckless to be lazy on a 15 minute form when the risk is you're locked out of so much of american life for an extra 6+ months because you realized too late you actually have a use for work auth.