@Auggie They don't need weighted suits. The escape velocity on the moon is more than 2 kilometers per second. No astronaut is going to achieve that velocity simply by walking or even jumping on the moon.
The suits were indeed bulky, because of all that the suits had to accomplish. For one thing, there is zero atmospheric pressure on the moon, so to keep the suits from exploding due to air pressure inside of them, the suit had to consist of multiple layers of heavy material engineered to withstand the pressure. Add to that the oxygen tanks, the electric cooling systems, the thick boots needed for walking on a surface that has the consistency of broken glass, and a host of other factors, and the suits ended up being pretty heavy. But it was not to "weigh down" the astronauts.
By the way, if the moon had zero gravity, then those suits would have zero weight. But the moon does have gravity, and that is what holds that photo to the ground.
Apollo spacesuits weighed approximately 180lb (30lb on the moon @ 1/6th the gravity); the suits were gauky and cumbersome, hence it was easier to hop around than walk in them
