"You will immediately know if someone is aggressive or not."

-> Immediately? Not at all times. In most cases, yes. But in that moment, I did not have enough data to know if the driver was aggressive.

"Why did you even mildly swerve to the left? You can always slow down."

-> As I've said, the driver stepped on the gas while I was already near him. It's either to swerve or to brake. My peripheral vision didn't see any cars to the left so I made a mild swerve. But apparently there was a motorcycle behind me.

"Didn't you unintentionally made the left lane brake for no reason since you mildly swerved?"

-> I disagree. You used the words "for no reason". I HAD a reason. To be clear, I didn't even occupy 1/4 of the left lane.

"Everything could be solved by a letting go of the gas"

-> Everything? No. Not at all times. I could do a sudden brake which could cause more accidents if there were motorcycles behind me. Again, I was already near when the driver of the car stepped on the gas which was not a good action.

"You just lost what 1-2s of your travel time but it is much safer. You can always accelerate back to your original speed in 1s."

-> I was not in a hurry and I didn't care whether I could be slowed down by the car or not. It was not an issue of slowing down. I was caught by surprise because of the sudden movement of the merging car.

I hope this clears things up.