There is no harsh rule and no one argued that there was. Its just reading the situation.
We are in a hurry if we want to build around Lauri. When the clock is ticking you draft to maximize the upside of all your core pieces instead of just stacking maximum talent.
Its not that hard to see.
In order to build around Lauri we would need to make several moves. We have several needs and how do you suppose we can contend if we don't draft that type of player? No matter who you draft, you're going to need something else. The draft is not the only way to acquire talent, and this won't be the only draft between now and potentially contending with Lauri. If you need a certain type of player, you do not have to get that player through draft nor is the draft necessarily the easiest way to do so. The highest quality player is the player who will help us contend the most.