you're talking about destroying your boat just to move to an area where you already set up a portal as if transporting ore is the only thing the boat is for.

how did you get that portal there to begin with if it was on a far away island? - your boat.

the main purpose of the boat is exploration, its only a side bonus that it can be used to transport ores.

i mean, if you're complaining about being able to pick it up and go through a portal to build it there so you can bring the ore back, why don't you complain about world hopping which literally makes using the boat for transporting useless?