The issue isn't evolution, nor any other area of knowledge, the issue is how humans use language (or at least English.)

In many many areas, we use personification to easily abstract complex behavior and rulesets. It's a signal to the reader/listener that we are deferring discussion about exactly why or how something happens.

The oxygen "wants" to bind to the iron to create rust, because we're glossing over electron orbitals. The T-cell "thinks" it has found an intruder, because we're not tracing it's internal algorithm. The computer "guesses" when to retransmit a packet, because the details of exponential backoff are outside the scope of my explanation...