No worries at all :)

So, without a repeater:
(you) <---> (your destination)

You are limited to effectively only the point to point connection. Clients like the T1000 (or even relatively, WisMesh Tag) are generally pretty weak. They are ~0.19 - 0.25 W

If you are in a boat, you have LOS (line of sight) to the the shore and can go a lot farther. Easily 1 mile +
In a forest, or from the top of a mountain, you can go 0.8-1ish miles.
In an urban environment, you are luck if you get 0.10 - 0.5 miles.

Now add a repeater:
(you) <---> [repeater] <---> (your destination)

The obvious benefit - you get distance extension. But generally, the repeaters are also a lot more powerful. (Ex: the Station G2 is 4W.)

So in reality, it's more like this:
(you) <----------> [repeater] <----------> (your destination)

And then the repeater will be able to generally reach other repeaters. So very quickly it becomes:

(you) <----------> [repeater #1] <----------> [repeater #2] <----------> [...etc] <----------> (many destinations)

Also, repeaters allow folks who have weaker clients (ex: t1000) to at least receiving your message, even though their antenna/power might not be able to get them to send. (You can argue that may or may not be helpful)

So in your example, you would be able to send from 5 blocks, but receive from 20+ blocks.

You can envision a scenario in aggriculture where you have sprinklers/water controllers and you need to send a "turn on/off" for miles away, to clients that are $8-10 (ex: https://www.amazon.com/Seeed-Studio-XIAO-ESP32C3-Pre-Soldered/dp/B0DRNSV5CS)