I hear this all the time.

"All the smart guys are spending money on it, it must be valuable!"

You could use this logic to invest in real estate in 2007. Or you would've been eager to invest in WeWork had their IPO not been fucked. You would also believe self-driving cars are a good idea, but I'd bet my life savings against it knowing what I know.

Don't assume you're playing the same game as them when you can't actually provide any data that what they do works. Where is the actual "X dollars of surveillance turns into Y dollars return" data points? You're just providing speculation no better than the person you're arguing with, and honestly your argument is less compelling.