I don't know, I think signaling is OK, and I don't consider people why buy signaling products as "vain dumb and insecure". I just don't see that anything wrong with that. I mean, you made enough money to choose good, quality product, be that t-shirt, bike or even a car. Why not choose some premium brand with some signaling attached to that, instead of just buying generic nike t-shirt or toyota corolla car? If you like that Mercedes AMG Roadster because you think that it will make you more attractive to chicks (and btw it will, I guarantee) -- and you got money to spare, well, go for it! You made enough money to buy Porsche 911, why drive Honda Civic then?
I see people signaling with their choices wrt premium products, and I don't judge them at all.
>Frankly, I am frustrated with a common trend I noticed in the Bay area where people who couldn't be bothered to leave their home/tech bubble and interact with people outside their comfort zone
I've never visited USA in my life, and do not plan to, so your guess about me being SF resident living in SF bubble is wrong. :) I do work in ad-tech / advertising, though, so I learned something about how industry works. JIC, during my daily commute (I don't own a car and use public transit) I see more people who make $500/month than people who make $5000/month, so no bubble here. :)