The purpose is that you have to sail to meet the sea serpent and the leviathan ;)

Originally posted by Lee23:

I seriously cannot see any reason for ores to NOT be teleported, besides unnecessarily and artificially slowing down gameplay. I figure there's mods I can install to fix this, right? I love the game, but the developers seem to be quite stubborn when it comes to this specific feature, and I can't figure out why.

I don't think it's fair to call the developers stubborn about a feature you do not like. I've expressed a similar thought before, but remember Vikings were known for their ships and sailing. If you could teleport all ores, there would really be no need for as much sailing, taking a major component of the game and making it pretty useless (to to explore and find new biomes, if you have to)
I like the restriction because it forces you to brave the seas with valuables, and adds a layer suspense and thrill you wouldn't get otherwise. What I think they should do is make the time on the ship more enjoyable or interactive. Add NPCs to the dock that remain there until you sail, so they heave and hoe and sing songs and speak of great battles and myths of odin. Add something!

honestly, yeah, you make a really good point too. if i had more fun while sailing, i wouldn't dread it. but i don't want to look at an empty sea while dealing with wind mechanics for like 30 minutes straight while evading sea monsters that i have no way to kill atm. if it was enjoyable, I would not mind the no-teleporting-with-ores mechanic at all.

This echoes my thoughts exactly. The entire swamp experience has been beyond foul (it stays in theme i suppose) and has depleted my patience in record time.
One thing's for sure : when i'll make a new world, i'll use the dev console to reveal the whole map at the start and re-hide it just to check if it's worth investing time into it or just re-roll the rng dice.

Valheim's theme is give and take.

You get better armor, but the armor takes movement speed
You get better food, but it takes more ingredients and upgrading a kitchen
you get potions(Mead), but it takes farming and time to make the Mead
You get the ability to sail, but sailing takes time and safety
You get the ability to teleport instantly, but takes your ability to travel with ore.
Don't like it? Mod it out.

There is a mod (Valheim Plus) that allows one to transport ore & ingots through portals. I only downloaded and used it after I had finished the content up to this point. Using my longship to transport ore had simply become a timesink. My son, who is deadset against mods, gave leeway on this because the game already allows one to transport ore by taking it in one's inventory to another server then transferring back, circumventing the longship only prohibition. I was also allowed to adjust the light levels so evening was not so dark, because I am old and the lower light levels were too much of a strain on my eyes. As you can see from my avatar I have poor vision & a stigmatism

As is common in popular games of this genre, if there's something you don't like or would like to see changed, don't worry, "there's a mod for that".

"Quando Omni Flunkus Moritati" (Red Green)

Fellow Vikings - The devs have clearly stated that ore will not be allowed in portals for various reasons (Regarding ores through portals). As other users have pointed out, mods exist to make this possible if you're allergic to sailing.

I suggest thinking of other creative transportation solutions to suggest to the devs as opposed to beating your heads against the "ore vs portals" argument over and over again.

I am sure there is a mod

But it's also satisfying sailing home with a ship full of cargo

You have a good point, yeah. Sucks that the swamp is so far from my main base. Maybe I should just move to here, IDK.