You're not really disagreeing, except on terminology. You're defining "specialist skills" as "narrowing down your work away from (do everything that allows me to live on my own)", whereas your parent meant "specialist as opposed to <easy>". For example, someone working the checkout in a shop is technically a specialised job (by the definition you're using), but in the context of our current culture it's easy enough that a vast majority of people could "become specialised" in it almost immediately.