Do we buy it ? Yeah if we consider it " manga accurate light speed " in the real world moving at above 90% speed of light even hitting a dust particle would result in a nuclear explosion in terms of energy release he would've been done for in the process xD
And my guy went through several buildings...so i say we buy it for the sake of visual representation of someone going fast af it's visually cool but it's nowhere near real world light speed level of potential destruction