confused

I am completely confused after this video. I have several questions.

1 - So Pet is an object as well right, which was created by using Class and Constructor Method and it further makes instances of Pet Object ( As she said, the getter method will not be attached to it (Instance Object), but still can be accessed , that means it is connected to the Pet Object, right?) Because whenever I try to log ernie it always shows as

Pet {animal: 'dog', age: 1 ............}

But if I make an object with Literals it just prints out the properties in {} braces.

2 -

class Pet{
  constructor(animal, age, breed, speak){
    this.animal = animal,
    this.age = age,
    this.breed = breed,
    this.speak = speak
  }
  speak(){
    console.log(this.speak);
}
  activity(){
   const today = new Date();
   const hours = today.getHours();
    if(hours > 8 && hours <= 20){
      return `Playing`;
} else {
     return `Sleeping`;
}
}
}
const ernie = new Pet('dog', 1, 'pug', 'Woof Woof');
console.log(ernie.activity());
console.log(ernie);

In the output it still does not show the activity() Method & speak() attached to ernie?, It is just showing Properties, even if I do this without Getter Method

3 - If we can do everything with normal method too, then why do we need getter method any specific difference, coz I am getting the same answers ?