That tank squadron will have spent 24 hours digging into that position, if the engineer support was even available! An infanteer achieves the same level of concealment much more easily.
Or maybe the tank used its 50km/hr engine *finding* a suitable, natural defilade.
When you're on the attack, you often don't have time to dig in and instead have to make due with the natural terrain. Tanks will reach those natural slopes and enter hide position faster than infantry.
