system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why have internet service websites killed off professions such as travel agents, but have not killed off professions such as real estate agents and stock brokers?

I know websites like travelocity and hotwire have hit travel agents hard since the internet has boomed over the  past 15 years, but why isn't this applicable to stock brokers and real estate agents?

I can see an argument for stock brokers, but I don't see the value of real estate agents. Literally 90% of the agents I have worked with know little about the area they are representing or assisting in, and I don't see how they provide value. It seems like a very marketing heavy business with the electric fence known as the MLS guarding the industry.
gpt
It has indeed killed off a *lot* of stock broker jobs.

Real estate agencies in many regions represent a *cartel.* They are hard to displace because they control so much of the market at one time, and collaborate to limit the success of any competing group that won't join their team. Cartels usually collapse eventually, but it can take many many years.