Because all I would ever need to do is set the default gateway for each LAN. I've seen this discussion before and maybe you didn't detail enough to show why a proxy is needed. But for now, it's a bit simple. Just a common IP setting.
Your new networker tends to use a proxy where none is required.
I'm looking to implement a single proxy server for two different VLANs. Both VLAN have outgoing traffic configured through different ISP i.e. traffic for users on VLAN1 is routed through ISP1 and traffic for users on VLAN2 is routed through ISP2. Inter-VLAN communication is enabled. The proxy server should route internet traffic for users in VLAN1 through ISP1 and for users in VLAN2 traffic should be routed through ISP2. Is this setup possible? If yes, how?