This news definitely killed my hype for the film. See you for the next Tomb Raider reboot, Hollywood.
For a character that people love to frequently compare to Batman, you don't see people saying Batman needs to get over the death of his parents and focus on something else.
I am fine with this being a permanent part of Lara's character and being emotionally invested in what she's doing doesn't negate the possibility (or likelihood) of an actual exciting adventure. Uncle Ben always dies. Some things just don't change. You can still have an interesting story with some permanent narrative elements.
The difference is that this was never part of Lara Croft's original backstory. From TR1-6, Lara's parents were very much alive, having disowned her because they disagreed with her treasure hunting lifestyle (and they were neither archaeologists nor did they have any particular interest in the subject matter). The first film shoehorned her parents being dead archaeologists into her background and then Crystal copied the films rather than the actual source material. It simply doesn't fit with her character. She's supposed to be a rebellious, independent, emotionally closed-off loner who makes her own path, not a daddy's girl dutifully following in her parents' footsteps.
Not to mention that it's incredibly cheesy and cringe-worthy for an action-adventure hero's origin story to revolve around their dead or missing parent/s. In Batman it works because it's a superhero film and you expect certain tropes from that genre but for Tomb Raider it just feels cheap and lazy.
I do think it's a little sad that they can only seem to define her personality by her relationship to her parents.
It just shows that they're lazy and not looking at the actual source material because there's a lot to work with in the first six games (and the original bio) in terms of characterisation. Sure, there are moments of inconsistency here and there and you have to do some interpreting and read between the lines but despite what many people seem to think, Core Design's Lara actually had a lot of personality and depth, she simply didn't wear her heart on her sleeve so that's why many people wrote her off as a one-dimensional "ice-queen".