Unless that armor can somehow withstand thousands of pounds of pressure focused through a blade edge, then I doubt the armor is going to stop the ion blade. To further that, most people use stereotypical equipment. Next to no one uses anything interesting and innovative. On top of that, your argument suggests that no one dies during a sword fight, which isn't true.
And as anyone that knows Star Wars, they would also know that those whom use lightsabers get cocky when facing off against other technologies. Putting almost absolute faith in their saber. So for them to even begin to be able to react, they'd need to know what kind of weapon is it was before engaging it. Otherwise you're left with the "Oh plops" face a second before the blade hits. And Force Choke isn't automatic. If someone did decide to engage from a distance, in doing so they'd give the time for a counter offensive. In the firm of the previously mentioned liquid metal discharge system, det darts, or 20 MM electronic discharge system used to compliment the user's Force Lightning.