It's an accessibility effect. Because "front end web development" is the most easily started of the items you list, anyone with a browser even most mobile phon

It's an accessibility effect. Because "front end web development" is the most easily started of the items you list, anyone with a browser even most mobile phone browsers are sufficient these days, there is a larger pool of "interested" people who recognise the topic. Since the larger pool is more diverse it starts to exhibit behaviour we consider more typical of "the general population" instead of "us programmers". The modern trend of ninja and rockstar developers is nothing more than normal group psychology. Your options are "run away into a more specialist niche" where the population is more to your liking, "ignore it" like reality tv, or "go native" and learn how this new aspect of technical culture can be useful to you.