The use of dynamic warm-up or static stretch at the beginning of a workout really depends on the type of workout done. If moderately heavy sub-max or maximal loads are being used (so anywhere from 65% to 100% 1RM) and/or if power generation is involved, then it makes sense not to do any static stretches at the start of a workout and just use dynamic warm-ups instead.
Static stretch at the start of a workout only seems to make sense for correcting muscle imbalance (such as the case of doing corrective exercise or for the stabilization phase of functional training, where the work loads are extremely light). Either way, the static stretch will only target trouble spots as opposed to being applied total body. This is so that the present muscle imbalance doesn’t hinder optimal movement prior to exercising.