If your friend truly had your welfare in mind, he would be more focused on the value that he can provide to you instead of merely trying to get you to switch agencies. Going through the pros and cons of switching first would be a good start. Else, I’d be skeptical too. If you are adamant about not switching, honest with him and tell him you have no intention to switch. If he truly believes in putting your personal choice and welfare first, there should be no further reason to push for a switch (unless the costs of not switching is proven to be higher).