Big brand websites usually have decades of trust and backlinks to lean back upon. As a person working in SEO for 20 years, I'd argue calling search engines lazy is just lazy. It's a billion dollar industry. Whatever ranking factor they decide on, someone will abuse.

Consider how bad the results would be if I could generate 100 scam sites in a day and outrank traditional media. Only to repeat it tomorrow. Now step it up and have tens of thousands of people doing the same thing. Every day. Trusting a 30 year old domain isn't lazy.