Because in pretty much every other speedrun you don't get prep time, your time starts as soon as you gain control of your character. What's the downside of including the first 45 seconds? The run would be more accurately timed to how long the run actually took. You are already playing the game actively for the 45 seconds that isn't counted at all.

The joust rules say "Win a Joust game in a custom game against a full team of 3 bots." But both runs under the category have 5 bots on the enemy team. Is this just a typo that should be changed? Can you do joust against 5 bots or should it be limited to the 3 the rules refer to?

Why does the run timing start after minions spawn? You can do so much during that first 45 seconds that isn't being timed.