Coolant tank replacement - help me understand why you need in the engine compartmen

[michael_J_brown]

I've read DIY after DIY and technical bulletins on replacing the coolant tank but no one has said why it is so difficult, just that it is. Just looking at the unit it seems like the hoses all connect right there in the front seems like it should just pop out.

Someone with experience in this please tell me and everyone else that might be interested why exactly is it such a huge hassle. Why would you need to disconnect the hoses on the back of the firewall?