In the old days, sales would close a client with the help of someone in technical sales and a solutions architect that would come up with a high level spec for a solution. That spec would be fleshed out post sales and then given to an engineer to develop.
Today the FDE often does both.
The difference between Palantir and pure consulting is that Palantir has a core software platform that they customize per client. The business model is more akin to IBM or SAP products.
It's certainly working on me, because I like talking with stakeholders and identifying problems I can solve, and I don't like sales. I'm far more likely to apply as Forward Deployed Engineer.
If you are forward deployed then you get deployed forward (away from comfortable home office).
Still i want to believe i'm wrong and it's a good job.