The modern view of the measurement problem is that any interaction of a particle (say an electron) will cause its wavefunction to 'collapse' in the process called decoherence. No need for conscious observers, interaction with any other particle will cause decoherence hence collapse of the wave-like electron into a definite electron at a definite location and time (definite within the uncertainty principle depending on its momentum). Now, forces are also believed to be mediated by 'particles', photons, gluons, W and Z bosons... One might believe that in carefully controlled experiments, all these force carrier particles are sufficiently isolated from the 'to be observed' electron as to let it travel as a wave until it will interact with any other particle from its environment, whether it being some other fermion or some boson. But gravitons, if they exist, can not be isolated from the electron, they permeate the whole space in the lab. If they exist they must continuously interact with the electron and we have no way to avoid that. Assuming that gravitons exist, how come the interaction with them does not collapse the electron's wavefunction? Should we take this as a hint that gravitons do not really exist? Incidentally, the same could be said about the Higgs boson, in principle we have no way to avoid the electron interacting with it. So why can the electron still display wavelike behaviour? Why do not interaction with the Higgs or with the graviton cause collapse of the electron's wavefunction?