Terrible and stupid idea of passing Activity via Bundle

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/text1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Hello World!" />

    <FrameLayout
        android:id="@+id/content"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</LinearLayout>

ISomeAction.java

package pl.selvin.terribleidea;

import java.io.Serializable;

public interface ISomeAction extends Serializable {
    String KEY = "interface";
    void sendAddress(String address);
}

MainActivity.java

package pl.selvin.terribleidea;

import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v7.app.AppCompatActivity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity implements ISomeAction {

    TextView textView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        textView = findViewById(R.id.text1);
        if (savedInstanceState == null) {
            //pretty normal stuff: WE DO NOT ADD FRAGMENT AGAIN AFTER ROTATION
            //it will be recreated by system WITH THE SAME ARGS
            //which obviously means that Activity passed via arguments will not be valid
            final Fragment fragment = new Frag();
            final Bundle args = new Bundle();
            //TERRIBLE AND STUPID IDEA DO NOT DO THIS!!!
            args.putSerializable(ISomeAction.KEY, this);
            fragment.setArguments(args);
            getSupportFragmentManager().beginTransaction().add(R.id.content, fragment, "TAG").commit();
        }
    }

    @Override
    public void sendAddress(String address) {
        textView.setText(address);
    }

    public static class Frag extends Fragment {
        @Nullable
        @Override
        public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
            final Button button = new Button(requireContext());
            button.setText("Click me!");
            button.setOnClickListener(v ->
            {
                Bundle bundle = getArguments();
                ISomeAction iSomeAction = (ISomeAction) bundle.getSerializable(ISomeAction.KEY);
                iSomeAction.sendAddress("aaaaaaa");
                //obviously ((ISomeAction)getActivity()).sendAddress("aaaaaaa"); will always work!
            });
            return button;
        }
    }
}