Pirates historically ply waters/space that are on wealthy lanes on the edge of patroled space at key choke points with safe havens near by. Lets take these one at a time. Wealthy lanes in the case of the West Indies this was the Spanish Gold, Rum and Slave routes in Eest Indies it was spice and other goods. The West Indies though patrolled by fleets was large and the number of shipments were high so their were often not enough ships to convoy every shipment or to guard every ship. The Spanish had gold fleets to try and reduce damage. The East India had the East India company running convoys. Pirates would pick off the stragglers and the ships not assigned to the convoys. Choke points are also key. In West Indies there are only about 4 straights to get out of the Caribbean Sea, East India the Malacca Straight was a major choke point along with the horn of Africa, and the Straights of Gibraltar. At everyone of this choke points at one time or another there have been pirate havens: Barbarie Coast, Madagascar, The Bahamas, and if my memory is correct Medan for Malacca straights. Each of these were home to dozes of pirates led by one or more Pirate Princes.
There are so many things wrong in that paragraph ranging from history to geography to even spelling that it would take multiple posts to correct them all. If someone was purposely trying to write something that bad they would have been hard pressed to do so.
So pirates do exist IMTU but not because of weapons or fleets but for geopolitical reasons that have been around for thousands of years.
That is the only worthwhile part of your post. The presence of piracy has been, is, and will be a geopolitical issue.