The search for quantum gravity is primarily motivated by theoretical and conceptual concerns, and most proposed motivations are optional desiderata rather than necessary constraints on the theory.
Comment on "Do Gedankenexperiments compel quantization of gravity"
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There is no conclusive theoretical argument that would require the quantization of the gravitational field. A paradox presented by Mari et al. [Sci. Rep. 6, 22777 (2016)] and its resolution by Belenchia et al. [Phys. Rev. D 98, 126009 (2018)] did not change anything about this assertion. Despite being interesting in other respects, efforts of a recent work by Ryding, Aurell, and Pikovski [arXiv:2107.07514] to further establish the inconclusiveness of the question of necessity of quantization are futile.
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Why Do We Want a Theory of Quantum Gravity?
The search for quantum gravity is primarily motivated by theoretical and conceptual concerns, and most proposed motivations are optional desiderata rather than necessary constraints on the theory.