I would be wary of any advice from anybody to modify an item youvwwn,,expecially if it ciuld relatr to your personal safety.
It’s one thing to follow your yiur own ides and opinions. Somrthing else to give it to s0someone and walk away bearing no resposibility for the consequnces:.
You can probably do without those screws so long as you aren’t doing brake wotk. There is a slight chance that with the cliper off, the disc could move away from the hub face and become slightly askew. If the wheels were to be remounnted with the disc out if position, it could become wedged in that position as the lugnuts were tighteded, and possibly warp before you figured out what was wrong.
It’s a slight chance, but possible. The soultion is to learn a method of getting thise screws out, starting with usinf JIS #3 screwdrivers and bits, not phillips, with those screws.
The only one I wouldnt use is the ballpeen hammer technique, which can and has caused heads to shear off. A there’sca backstreet mechanic (ireland) youtube video using my fallback technique.