Moments of levity are needed to prevent the game from being full on emo doomer. The car banter (especially if you were romancing Liara at the time) was one of them.
The Mass Effect world is full of moments of levity that were well written and felt natural for the scenes. That's one of the things that make the world an IP so beloved.
The bickering in the sky-car, in the middle of chasing the attempted assassin of a main character and potential long lost love interest... It was just bad writing and poor game design.
Maybe I need to play through it under multiple scenarios. Is the dialog maybe different paragon vs renegade? Different if you aren't romancing Liara?
Speaking of, it feels like you
were romancing her.... but outside of the picture in your quarters and a painfully awkward kiss with little excitement, it doesn't feel like they ever romanced in ME1. Liara is some kind of new information broker, but had only heard rumors Shep was alive after recruiting half the fucking galaxy and painstakingly scanning half the fucking galaxy for would have been months at least. Finally find your lost love (and for my paragon femshep it was real to her, damn it). And it's super awkward: go break the law for me, great here's some credits!
The sky car, ignoring how fucking dumb the name is, was especially bad for a character romancing my lesbian paragon femshep who probably actually loved Liara and wasn't just hooking up.
It was shit writing, that felt at the service of trying to force in a game mechanic that wasn't needed. And less for the sake of levity, which the game has plenty, rather than the dumb push at the time to make everything feel like an epic JJ Abrams fast and furious in space that plagued the era.
Feel free to like things that are objectively bad, or just say they didn't bother you as much. That's great, we've all done that. But I don't see the point in defending what is such a glaring low point for the series, and at that point was a huge red flag Bioware had the potential to shit the bed with poor writing and design decisions in the future, which it did.
Imagine the production meeting: this is an amazing DLC, maybe the best.... Buuuut can't we work in some levity to shit on what should be an intense and frenetic story. Aaaaannnd with sky car mechanics we don't really utilize much, but already wasted time on.... With a car chase in space!!! With a ton of thoooopper fuuuuuunnn bickering between the characters.
Someone should have said no. But the problem with Bioware is they seemed to have lost the ability to say no to dumb shit (and dumb shits) that overrun the company.