That was certainly the case on the first occasion that one of these drones was deployed to attempt an infiltration,as the israelis had to get an attack helo to engage it inside israeli airspace at very close range.
It does make sense to probe their ad radar coverage for any gaps or weak points,because in any war with the zionists iran will need accurate,and ideally in real time,assessments of the damage that the missile forces are inflicting and whether certain critical targets,such as air bases,have been knocked out for beyond the expected duration of the conflict,or whether there will need to be more follow up strikes,and only drones will be ale to provide this in the short to medium time scale,or at least until we have a constellation of iranian recon sats.
Another possibility is that before the missile forces are unleashed,drones like this could be used to target,either directly or with stand off munitions,critical bits of the israeli iads,such as the arrow,which being a fixed system makes it very vulnerable to this sort of surprise attack.
Lastly it is kind of funny,you have the [arab] claims of israeli f35s supposedly infiltrating iranian airspace,yet its the iranians who are the ones actually attempting to infiltrate israeli airspace using low observable drones.