Not necessarily. Bayesian methods work great when you have expensive objective function evaluations that can only be evaluated in serial (or limited parallel evaluations). Bayesian methods aren't ideal in massively parallelizable evaluations (evaluating >100 points at a time) or when evaluations are relatively cheap. It depends on the cost of optimizing the acquisition function. I've actually played around with combining BO with evolutionary algorithms to extend BO towards massively parallelizable evaluations and have seen some promising results.