While it had a famously terrible glide ratio, it did glide, and this meant that it could use these control surfaces to steer without needing to carry or burn extra fuel -- which is very important in a weight-critical field like spacecraft design.
Capsules don't produce any lift, for all practical purposes. They can't be steered using control surfaces, at least not in the same way as the Shuttle orbiter; their best means of slowing down are either a chute or soft-landing boosters, or both.
Chutes are subject to the wind, while soft-landing boosters fire only a few feet above the ground, and neither give any real steering ability. Between this and trajectory variations on re-entry caused by wind throughout the atmosphere, you can't achieve the same level of precision when landing a capsule compared to the Shuttle orbiter.