Is there a point in adding a 1 Ohm resistor to this LED circuit?
Not really, A 1Ω resistor will work as well/poorly as no resistor at all.
IMHO I think no resistor would work best for this LED. But I would not use this LED.
No resistor may be better than 1Ω. It is not likely that Vf will not exceed 3.3v somewhere in the visible range. When Vf reaches 3.3v current will stop increasing. This is very likely to happen before the 30 ma max.
According to the I-V curve typically the current will be 20mA @ 3.3v with no resistor. So adding a resistor would only make the LED dimmer.
The LED you specified has a max 4v Vf. While it can be run with a 3.3v supply when Vf when the LED work in the typical range. The 4v Vf max falls outside operating parameters.
so is 1 ohm here a safe choice?
Maybe, maybe not, very likely it would be safe. But not really any better or worse than no resistor.
The problem there is no minimum Vv specified.
The risk would be if the Vv were lower than typical, the current could increase to more than the max 30 mA rating of the LED. Not too likely but possible.
It would be reasonable to guesstimate Vv min could be 3v (10% below typical).
At 3.0v a 1Ω resistor would allow 300 mA. Not that it would be reasonable that this would happen, Vf will always increase as current increases. The question is: How reasonable is it that Vf will be under 3.3v @ 30 mA? Assuming the supply voltage will never rise above 3.3v.
As long as Vf is at or below 3.3V at 30 mA, no resistor is fine. As the current increases the forward voltage rises above 3.3 and it is at that point the current stops increasing. It is very likely with this particular LED Vf will always be greater than 3.3v at 30 mA.
The allowable LED current is 300 mA with a 1Ω where Vf = 3.0v
It would be very safe to use a 10Ω to limit the resistance to 30 mA at 3.0v.
But there you have the flip side problem. If the Vf is higher then the LED may not be bright enough. With a max Vf of 4.0v this is well within the realm of possibilities.
If this circuit were in a product to be sold to others, I would not use this LED.
If it to be used for myself, I would be okay with no resistor. If there is any possibility that a component will generate a field service call, I am not going to use that component no matter how remote the possibility. Even with no resistor.
I would use a higher power LED that has a Vf below 3.3v. A mid power LED will typically have a Vf of 2.8V at 100 mA.
I would want to see an I-V curve closer to this: