It’s not all that alarming…
Living things do not have need for objective reality as long as subjective reality is sufficient for evolution of survival mechanisms.
GR explains the subjective nature of observation, from which objective mathematics may be deduced.
Observers are powerful players in the quantum world. According to the theory, particles can be in several places or states at once — this is called a superposition. But oddly, this is only the case when they aren't observed. The second you observe a quantum system, it picks a specific location or state — breaking the superposition. The fact that nature behaves this way has been proven multiple times in the lab — for example, in the famous double slit experiment.
Oh, I’m not alarmed. But some people may be.