The FLRW metric is used to model our Universe on large cosmological scalescales. It is a conformally flat metric and the form of stress energy-energy tensor that we get from Einstein's equations areis often equated to the stress energy-energy tensor for an ideal fluid. This ideal fluid is interpreted to describe a combination of matter fields (dust) and radiations. Now, it is generally the case that any local source of energy and matter distribution would produce a non-zero conformal curvature. So is it really justified to interpret the stress energy-energy tensor in FLRW cosmology to represent a general matter-energy distribution (dust + radiation)? This model has predicted that the percentage of ordinary matter is only 4%, dark matter 24%, and dark energy 72%. Should we need to revisit these claims if the interpretation of the stress energy-energy tensor is inaccurate?