it’s just that it doesn’t make sense for them to build an architecture for that market since the margins for servers are much higher

Hence ARM. ARM already has designs for low power, high performance chips for smaller devices like laptops. Intel is chasing that market, and AMD could easily get a foot in the door by slapping their label on some designs, perhaps with a few tweaks (might be cool to integrate their graphics cores?). They already have ARM cores for datacenter workloads, so it probably wouldn't be too crazy to try it out on business laptops.