Grow up.

Im sure the targeted Modern Audience will play the game at the required difficulty right?

How is that fine?

I think you're putting too much stock into the achievements system.

Look at it this way:

If someone who really plays casually can't do anything above easy... They're not allowed to earn achievements, even though they did the same things in game? 50 headshots, 30 enemies using some special attack, etc? Buddy, someone playing on hard can do everything the person on any difficult below that can do. That's the entire point to games unlocking cleared trophies for every difficulty below that: if you beat Uncharted 4 on Crushing for example, you earn the cleared trophy for everything below that. That's great in my opinion. You've beaten the game on a difficulty that throws everything at you. Of course you can do everything below that.

But why would you prevent someone from earning ANY achievements? Cleared trophies are fair to restrict, but not the whole game.

What do games from the Walking Simulator genre do?

This is the right idea. It’s up to the devs.
Let’s not forget games used to not have achievements/trophies or any incentive outside of just playing it…you either played a game because you liked it, or you didn’t.

No this isn't true. They don't restrict you from earning trophies by playing on easy, instead you earn extra trophies on the harder difficulties.

Do you people even play games or are you just bots?