It sounds like it was probably my post you had read. In my case, the distribution block was necessary because I wanted to keep my power supply on ground level and run cables through my wall and out to a mounted tv. The length ended up being about 10 feet. Power will drop quickly if trying to run through small wires (that's also the reason you get power drop within the actual LED strips). That meant I had to use 10AWG wire, which is rather thick. The distribution block allowed me to run the final legs in a more manageable 20AWG.
I chose to run power to the front and back of each strip on all 4 sides. If I was cutting corners, I would probably just run power to the front and back of the top and bottom strips, and just power the side strips from one end. But what's 2 more runs in the grand scheme of things?
I also went with a 30 amp PSU (334 ws2812b). It's better to run PSUs at 60-80% for efficiency. You don't really want them cranking out 100% all the time.
Here's my setup on an 85" tv https://imgur.com/a/Yp0Y0St
You likely don't need the capacitors and resistor with a good quality PSU, but they definitely won't hurt anything. They're there as more of a failsafe and probably wouldn't be needed with a properly wired system with good connections and a PSU without a voltage spike when powering up.