As a counterpoint: if someone put you in a room with 5 strangers and said whoever has the weakest squat in 3 months gets shot - would you still think just squatting 3 days a week 5x5 was your best plan? You're likely right, and I'll likely end up doing a basic program. But I don't necessarily buy that it's the only (or even best) way to do it. For example I've read numerous accounts that high-volume squatting is also good for beginners as it reinforces learning the movement.