Maybe. Even when a PM is very technical in their field, they are not expected to know the nitty gritty of the broad area they tackle in a program. To come up with realistic programs and execute them successfully, a PM needs to know where are the boundaries of current knowledge, how much $$ is required to push research to transition to real tech... and sniff out bullshit being sold by research labs. Bullshitters or not, they need to be really good at sniffing bullshit!