For the same reason that it is possible to share e.g. bluesky/facebook/instagram/etc. links. If you don't want to open X links you can use something like Libred

For the same reason that it is possible to share e.g. bluesky/facebook/instagram/etc. links. If you don't want to open X links you can use something like Libredirect to make sure all such links go through a proxy, this is what I do.