>>725035101
Because they were still figuring out the controls.
The tutorial mission is weird in that it's trivial and barely requires you understand anything more than how to move and direct the camera, then you're thrown into a fight with a boss that demands you evade or outmanuever highly damaging attacks and control your range and distance to make the most of your weapons.
Players who aren't familiar with the genre are still figuring out which button does what when they're thrown at this thing.
In hindsight it was a poor choice. The fight isn't particularly gripping or interesting, the presentation makes it feel like you're fighting the kind of mook a mecha should just roll over, which means when you struggle the power fantasy of piloting a giant robot is shattered, and being a wall right at the start of the game means players get frustrated or turned off before they really get a feel for how to play the game or its appeal. There's a reason why previous AC games usually wait until the end of the first chapter to put a wall boss in front of you, letting the entire chapter serve as an extended tutorial and the boss serving as the final test of the fundamentals you've had hours of playtime to develop.
Rather this guy feels like a cheap attempt to imitate the Soulslike meme of putting a powerful boss first so you're slapped around and humbled because LE PREPARE TO LE DIE. But one: despite all attempts this is not a soulslike and doesn't present the same appeal as a soulslike so this random difficulty spike gating you from accessing the rest of the game feels out of place, and two: it just kind of misses entirely what made tutorial bosses like Asylum Demon or Gundyr work, namely that despite being visually intimidating, they WERE easy, and were designed very specifically to test that you could apply the fundamentals already taught by the tutorial. The helicopter really doesn't.