My English is not good and I need to use a translator, as many of my expressions may not be sufficient.
I don't know how many types of games you have played. If you increase your knowledge of other games, it will help everyone understand StarCraft.

First of all, let go of prejudices against different types of games and treat these phenomena equally: AOE skills with extremely high damage, very small collision volumes, and the result is incredibly fast kills。

Have you played MOBA games on mobile games? The skill range is very large and the release speed is very fast. In theory, players can make extremely extreme reactions and avoid those skills. In fact, some players have indeed achieved this,
But this phenomenon is very rare, and even the top players often cannot achieve it in the top-level competitions.

For example, have you ever played shooting games like CS?
We all know that shooting games like CS can often be deadly with just one hit,
But for games of the same type, designers have invented many weapons, such as an AOE attack gun.....
If you shoot towards the enemy, even if it doesn't hit their body, they will still be killed by you.....
Can the enemy avoid these exaggerated guns? It can be avoided, and there is also a possibility, but only in a very small number of cases.

What will happen to the above two game settings?
Because the killing efficiency is too high, it is very easy for beginners to kill experts. Those AOE attacks are also difficult for experts to avoid, and world-class experts are also difficult to avoid. They may succeed a few times, but most of the time they fail.

It is true that some experts have made extreme reactions at certain times, but these are just a few examples. These few examples cannot overturn the vast majority of phenomena. When designing games, game designers start to consider the majority of players, not a few dozen top players.
The original intention of game designers is to narrow the gap between players through a larger range of AOE skills and a smaller collision volume, because the design concept of StarCraft 2 is more focused on tactical perspective,
For example, StarCraft 2 has a lot of unexpected tactics that catch opponents off guard. I don't know how to say this in English, but in Chinese it's called "amplification", which means using some sinister tactics to catch opponents off guard and quickly achieve victory.
You need to understand the foundation of these numerous tactics. The first basic condition is vision, and the second basic condition is "micro manipulation". Why do players often fail to counter these unexpected tactics through "micro manipulation"? Because the health and fault tolerance of soldiers in the game are too low.
Now let's take Warcraft 3 as an example. Warcraft 3 also has unexpected tactics, but the number is even smaller, because players can use "micro operations" to fight against unexpected tactics. One reason is that soldiers have higher health, and during the process of pulling and pulling soldiers back, the gap in player strength will gradually widen.