Why Bother with What Three Words?

Why don't you just make an open alternative is this is so disconcerting to you?

"superficially simple solution to a complex problems" --- Exactly this

While it might initially seem a bit easier to remember words vs numbers, W3W is a non-solution in many ways, many nicely described in the article.

Most critically, the W3W indicators have zero relation to actual geography. Adjacent locations have entirely different quasi-random identifiers -- there is no progressive gradation, and no indication whether two locations are adjacent or on different continents.

It does not scale, and leaves us completely dependent on a data connection and their servers to navigate.

There is also no way to figure it out from known principles. The entire system has many points of failure. With a street address, I can know which way to from seeing a couple of existing addresses; W3W - no way, need a data connection.

With Lat-Long I immediately know what part of the world I'm in, and what direction I need to move to move to get closer to my target. A GPS unit, or a simple compass and map will work great. W3W -- zero clues, and need a data connection to them.

Horrible, non-scalable, non-solution looking for a problem.

Massive marketing attempting to overcome bad technology.

On top of those reasons.... It's already a long-ago solved problem:

https://en.wikipedia.org/wiki/Maidenhead_Locator_System

The 3 words are because 2 words doesn't give you enough bits of enumerated data. The words aren't to be thought of as X,Y,Z, they're just 3 blobs of bits, where each word represents something like a 0-200,000 range or something.