Yes, but there are likely factors produced by both parties in the symbiotic relationship that keep each other in check. Otherwise one of the parties could become parasitic instead.
This whole conversation comparing evolutionary mechanisms that are complex enough to include self sacrifice just to have more "you", is a poor analogy anyways. While humans evolved their social dynamics, i'd like to think we can operate beyond what's best for our species.
More like two people sharing resources to reproduce more effectively while having a gun pointed towards each other at all times