Oh my god, why all these fakes? I thought the ship summoning wouldn't happen for quite a while, but it turns out it happens right after respawning... why are there extra shipyards on the respawn points? And those purple pillars are the same. I'm a little disappointed.

It's interesting to read this. If you look at the map in a flat and superficial way, then yes. These seem like meaningless objects. And even fakes.

Almost all objects here have a meaning. And even these shipyards. And even these pillars. And this meaning was intended to be not obvious.

I must say that the AI in Heroes is really bad. So, I don't know how it is on Chinese maps, but most of the maps I've seen have a complete lack of AI as such.

So, these pillars and these shipyards are needed precisely to make the AI work! And, what's worse, to make it work differently(!) for different difficulty levels! Not just for players like you.

And there are many artifacts scattered around here. But you won't be able to use them right and left.

I could, of course, explain exactly how the AI is trained in reality. But I don't think you'll be interested in that, as I understand it.

Added 22 minutes later
If it's not clear right away:
The purple pillars are needed so that the AI covers its locations with a veil of darkness, without having necromancer castles. As you know, the AI doesn't rush to do this if you just put this veil nearby, within easy reach. And only setting the goal (the desired portal) behind this veil, partially blocked by an obstacle, creates the AI's desire to visit this veil. Which is what was needed.
And why is the obstacle in the form of a purple pillar? Because at the moment the purple tent is passed, there are no enemies at the specified locations. And to speed up the purchase of creatures in a bunch of castles without a town portal, the pillars are removed.

And yes, many of the other pillars also have a meaning. Each one. And each one is where it should be.

Added 4 minutes later
It seems to me that I'm talking to seasoned professionals. So, here's a task for you: The AI comes to the Seer's Hut, but it doesn't have enough resources (it doesn't matter what) to get the gift. After a few days, it gets these resources. Make it come to this hut and get the gift. Draw a map - post it here. Let's talk about fakes and tricks.