I don't fully know what occured yesterday, but what I saw was multiple boats blown up and missile systems on the coast. Is that not your understanding? If all that happened was some drones invaded their air space and got downed then I'd be inclined to agree with you.
Allowing themselves to be consistently attacked during negotiations is also not in Irans interest. Appetite for war in the US has never been lower (ever), so the opportunity is there to retaliate.
Yes it's obvious to anyone with eyes Iran just wants to be left alone. And also the same for Lebanon. Thing is that doesn't appear to be happening does it.