Why is my code running from bottom to top-CodePudding

I am trying to do a transaction in the db with Eloquent ORM following the instructions here: https://stackoverflow.com/a/15105781/5649969

I notice that the code throws a Throwable, so I put it in a try...catch block to go for an early return if there is an exception.

try {
    DB::transaction(function () use ($user, $attributes) {
        $validUserAttributes = $user->getFillable();
        $updatable = [];
        foreach ($attributes as $key => $value) {
            if (in_array($key, $validUserAttributes)) {
                $updatable[$key] = $value;
            }
        }
        $user->update($updatable);

        $validRoleAttributes = $user->role->getFillable();
        $updatable = [];
        foreach ($attributes as $key => $value) {
            if (in_array($key, $validRoleAttributes)) {
                $updatable[$key] = $value;
            }
        }
        $user->role()->update($updatable);
    });
} catch (Throwable $_) {
    dd(1000);
    return new UpdateUserResult(false, UpdateUserResult::UPDATE_FAILED);
}

dd(2000);
return new UpdateUserResult(true, UpdateUserResult::UPDATE_SUCCESS);

This is where my problem is, it seems that the early return does not work for whatever reason, when I remove the dd(2000), dd(1000) will run, why does the code seem like it is running from the bottom to the top?

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