It really isn't, but vendors often make the IPv6 config optional and often don't have an auto-config wizard for IPv6 like they often do for IPv4.
Take Ubiquiti EdgeOS, setting up a PPPoE with IPv4 has a dedicated GUI wizard that shows up when you first log on, but IPv6 config is all confusing CLI commands.
IPv6 is haaarrrrrd because vendors are lazy.
Don't worry too much about getting 'locked in' to a job, you can always do a career change, it's a lot easier than you think.