Question: Why is it easier to jump with a wakeboarding boat?
About the article "Wakeboarding", section "Boats".

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The most common difference between a regular runabout and a wakeboarding boat is the wakeboard tower, normally constructed of thick-walled stainless steel or aluminum tubing, which places the "pull point" about off the water's surface.
The high tow point makes it easier to jump and get air as the rope is not pulling downward as when it is attached to the low tow point used for skiing.
Most modern wakeboarding boats also have a variable ballast system, which allows for water to be pumped into and out of ballast tanks from the surrounding water.
Adding ballast increases displacement, and consequently enlarges the wake produced.
A significant portion of wakeboarding boats utilizes V-drive propulsion.
These boats have a regular inboard engine, but are turned 180° such that the transmission is in front of the engine, rather than behind, or "inline", which is a more common layout for inboard tournament ski boats.
The prop shaft exits the transmission towards the rear of the boat, so that the prop is placed directly under the engine.
When viewed from the side, such a layout appears as a "V" lying on its side.
This layout allows for better weight distribution(with the engine farther aft), and places the prop farther forward, reducing the danger of the spinning prop near the stern of the vessel, where riders enter and exit the water.
The Air Nautique line up of boats is Correct Craft's wakeboarding package.
This means that the boat is outfitted for wakeboarding with a tower and ballast tanks from the factory.
The first Air Nautique was built in 1997, it was built off of the existing Sport Nautique Hull and had an automatic rear ballast system (Launch Control System or "LCS").
Other notable "landmarks" included Correct Craft's patented Flight Control Tower, which was essentially a modified fishing tower. 
Skurfing is a surface water sport in which the participant is towed on a surfboard, behind a boat, with a ski rope.
Skurfing is highly popular in the state of W. A in Australia and in many other places in the world.
Skurfing is not a professional sport and has no competitions; it is a freestyle sport with highly individualistic style and form.
It may be considered the precursor to wakeboarding. 
Wakeboarding is a surface water sport which involves riding a wakeboard over the surface of a body of water.
It was developed from a combination of water skiing, snowboarding and surfing techniques.
The rider is usually towed behind a motorboat, typically at speeds of 30–40 km/h (18-25 mph), depending on the board size, rider's weight, type of tricks, and rider's comfort.
This speed could also depend on the year, make, and model of the boat because some boats, which are not designed for wakeboarding, create a different size wake which the rider may not feel comfortable with.
But a wakeboarder can also be towed by other means, including closed-course cable systems, winches, and personal water craft. 
Picnic Point features a number of parks and reserves along the river, including the Georges River National Park.
As the suburb’s name suggests, the area is popular with picnickers.
The boat ramps provide access to the river for boating and watersports such as waterskiing and wakeboarding.