Peter Wang in the recent Lex Fridman interview - https://www.youtube.com/watch?v=X0-SXS6zdEQ - gave me names for concepts I'd been noticing but couldn't quite put my finger on, essentially the pitfalls and externalized costs of "homogeneous demand" that's created via ads and algorithms - driving consumerism through making economy of scale easier to reach by generating more buyers at same time, and similarly leads to ideology or group think as you mention.