[member="Sabik Dhami"]
Please step back and go read the reasons stated above also given to [member="Samuel Quentin"] since they are quite canon.
And how is that so? When Ryloth fell, they couldn't get supplies to it from just anywhere. They couldn't just go around the CIS. You have to go through specific routes. They stated there were other options besides Toydaria, however, Toydaria was the closest and most forward the Republic could move from. Hence why Yoda in the very first episode had to convince Toydaria to join the Republic, so they could launch their liberation efforts on Ryloth.
Now is it reasonable to say that everyone should know every hyperspace route? No, of course not. I am not arguing for or against the Wayland issue, I just am attempting to educate and explain how come its impossible to travel from one side of the galaxy to the other in a straight line.
Case in point, most of the existing spacelanes in the known galaxy are the only routes because they're also the fastest. Some did become obsolete as new hyperspace routes were discovered. Its come to such a time that even if the beacons were knocked out, the maps showing the Hydian Way are good enough.
New hyperspace routes could be possible, its just incredibly unlikely. Or, they are still possible, but they'd have so many twists and turns, and thus stops a ship would have to exit hyperspace to jump down a new straight line, they'd be slower than taking already plotted routes.
The only known safe way to plot a hyperspace route was to travel at normal speed, in the straight line, as far as possible, until one hit an obstacle that would stop a hyperspace jump, then go as far it took until they were clear of the obstacle and then orient themselves back on the straight line. Once a route is mapped out then one could establish hyperspace beacons along the jump points and you have yourself a new spacelane.
This was actually how Outbound Flight worked. Though on a grander scale since its job was to establish colonies, find new worlds, and connect that new territory to the rest of the galaxy. The project was in for the long haul since they intended for families to pass their duties down the generations.
So case in point for [member="Sabik Dhami"] there are not infinite routes. However, I do agree there are enough existing routes to complicate defending every one, especially since Interdictor Ships are a rarity in canon even due to costs and their attached weaknesses. But there are still few enough where chokepoints are indeed possible.