I don't get why people think this is a move with some agenda, most likely they just don't think enough people use the single cookie deletion functionality to warrant having it in the settings vs the dev tools.
https://developer.chrome.com/docs/devtools/storage/cookies/
Contrary to the headline, Chrome isn't removing the ability to do anything -- they're just removing it from the preferences interface, where I'm not sure it really ever made sense to include in the first place.
Truly, editing/deleting individual cookies isn't something any regular user ever needs to do -- just clearing per-site, which continues to exist in preferences.