It is not that the hypothesis is absurd, but that it is useless
All philosophical concepts are in a sense useless except insofar as they can limit what you attempt to do, rather than open new avenues for investigation. Panpsychism limits the possibility of investigating the ultimate nature of mind in the same sense that materialism limits the possiblity of investigating the ultimate nature of matter—given that everything is made of mass-energy, you could never disconfirm “X is composed of mass-energy”. Materialism is quite useless, in the same way as Panpsychism.
All philosophical concepts are in a sense useless except insofar as they can limit what you attempt to do, rather than open new avenues for investigation. Panpsychism limits the possibility of investigating the ultimate nature of mind in the same sense that materialism limits the possiblity of investigating the ultimate nature of matter—given that everything is made of mass-energy, you could never disconfirm “X is composed of mass-energy”. Materialism is quite useless, in the same way as Panpsychism.