no High school wrestling is amateur wrestling and WWE is professional wrestling. Sure, many professional wrestlers have amateur background but being an amateur wrestler doesn't automatically mean you'll be capable to be a professional as amateur wrestling is competition kind of thing and professional is acting.
Amateur boxing is not supposed to be a paid situation. Sometimes amateurs can be paid for expenses like meals and travel.
This depends on the sumo wrestler and wrestler in question. However, it can generally be agreed that sumo wrestlers are stronger. (However, many recreational/amateur sumo wrestlers are not strong)
An amateur
If you are an amateur, then by definition you do not get paid.
none unfortunely im an amateur actress
doesn't get paid that's why he's an amateur... can be rewarded with gifts as way of payment but cannot officially be paid by cash
after every match they have
With money
There are not entrance fees for the wrestlers, they don't pay to wrestle, they get paid to wrestle and they are paid by whatever their contract states.
Because they have more experienc and are a bigger draw
The moment you're paid to participate you are no longer an amateur. So if an amateur sport, say kickball, wanted to become professional, they would need to establish a league that paid their players.