What's it like to be the gym partner of a hotdog eating champion?
In both cases, despite an apparent correlation, they are two entirely different, mostly-unrelated things.
Too absurd? Let's take the original question, and modify it only slightly:
What's it like to be in a long-term relationship with a Chinese person?
Certainly a bit presumptive, if not offensive, no?
Pickup artists utilize a set of skills and talents to hyper-condense the initial introduction/attraction phase of getting to know someone, largely in the hopes that that knowledge can become biblical at some point. That's it.
While very few "pickup routines" would be useful in a long term relationship, the overall strategies of "be the best you possible" and "fulfillment comes from within" are certainly great cores for long term relationships… So long as one is able to both retain an independent identity and respectfully communicate and negotiate with someone else at the same time. It's harder than it looks, but no harder for pickup artists than the rest of us…