A. The snatch block you linked originally has reviews of it failing. Robot CheckWhat difference does it make.
If you can double the capacity of your winch. And its cheap.
Don't go out mudding by yourself.
Take food and water.
B. You said a 10000 pound winch was too much for a Ranger. Which you might be correct, but they were talking about a 6000 pound winch. Which Polaris sells a 6000 pound winch. ( Which I would hope that means Rangers engineers designed the mount and frame to handle that.) The price difference between the 4500 pound Polaris PRO HD brand winch and 6000 pound is 100 dollars. The difference in price between the Polaris regular 3500 pound winch and 4500 pound non pro HD winch is 150 dollars ( Polaris doesn't make a non pro 6000 pound winch, but I guess if they did it would be around the same 100 to 150 dollar difference )
I'm not saying that having a snatch block is a bad idea, but it is another point of failure. And of course you shouldn't go on a trail alone, but people do it all the time. Or like me I just drive through my woods and I have gotten stuck in some deeper snow. Stuff happens when you are by yourself.