Links on Slack don't have to be ugly.
I don't know about you, but I love things that look nice. To me, a message with a couple links (especially if they are long) doesn't look nice.
With markdown links, you can also add links to a channel's topic.
If you send a message (or edit a channel's topic) as [title](https://link.com), the message will be just "title" hyperlinked.