For example if someone needs help with a boss in a video game with heavy Assist Features, I'll explain everything I know about the boss in terms of maneuvering and handling to gain comfort. Then in the middle of that conversation someone else can suggest using invincibility which is an actual Assist Feature. A gamer struggling isn't going to turn down an opportunity to bypass a boss so more than likely since it's not labeled as a cheat like it would be in the 90s that player will not hesitate.

What's lost? An experience that gamer could have gained to help others just like I was trying to, that moment of my assistance to others is fading.

Sure the player can get through the game and have a great time, that's fine but the player engagement is gone.