Starting off; Mehdi is a hack, plain and simple. By his own admission, he trained for 20 years and accomplished nothing. Then, he "made" Stronglifts, and after like a decade of that he STILL is only squatting in the 400s. Despite all of this, he feels qualified to call himself a coach and sell programming, which would be great, except I don't know of a single athlete coached by the man. He's simply an app developer.
The reason I bring this up is because, if you listen to anyone who actually coaches people, none of them advocate training in the way that Mehdi has prescribed for beginner trainees. A true rank novice needs to spend time developing their work capacity and conditioning; essentially getting in shape to be ABLE to train. Once this is developed, a foundation is built with higher reps on basic movements (usually bodyweight, then progressing to machines, dumbbells and barbells), in order to continue developing that work capacity to enable recovery from training along with some basic hypertrophy, coordination/body awareness and strength.
We used to call this "play". Some folks have taken to call it GPP. Whatever term you use, a great deal of accredited coaches employ this. This is part of a basic accumulation block, which is the necessary building block BEFORE moving onto intensification.
Stronglifts does the opposite, and jumping straight into an intensification phase with zero accumulation or even basic GPP development, nor is there any real plan for it in place. Furthermore, Mehdi's strategy for overcoming plateaus is via fatigue management rather than increased volume, which is essentially a peaking strategy. For a beginner, this again makes no sense.
What Mehdi is building in stronglfits is the skill of moving maximal poundages on a limited amount of movements. This is the illusion of strength; it is in fact specialization, which is the last thing a beginner trainee needs to engage in. A more suitable plan would be one with a wide variety of movements and rep ranges where strength is broadly built along with size, work capacity, and conditioning.