Absolutely. Something that many people may forget or not realize is just how much of the Internet's traffic consists of bots - benevolent, malevolent, or benign. If you've ever made a machine's IP public and logged the IPV4 traffic, it's harrowing and sobering. The results of publicly available information on the Internet is outright terrifying if you are unfortunate enough to register a domain without WHOIS privacy protections through your registrar. The entire IPV4 space is constantly probed by bots and zombies for common vulnerabilities and data mining opportunities, and providing a humans.txt would only be serving any included information to bad agents on a silver platter. robots.txt is already a voluntary "standard", meaning that any agent accessing it must volunteer to respect it - providing more information to automated agents would certainly follow the same unspoken rule.

I think it's noble and fair for the people behind online content to wish to be recognized if they wish, but I would absolutely abstain from putting my name in any document like a humans.txt.