I get your analogy, but I think there are tons of hammer conferences.
There are conferences for most any language with wide adoption. There's also a Slack conference (not "TeamChatConf," but a "Slack Frontiers"). There's a GitHub conf (not "OpenSourceDevCon," but "GitHub Universe"). There is a Datadog conference, and so on and so on.
Maybe C just doesn't have one big company, or an ecosystem of smaller ones, that stand to benefit from gathering a bunch of C devs in one place.
There are conferences for most any language with wide adoption. There's also a Slack conference (not "TeamChatConf," but a "Slack Frontiers"). There's a GitHub conf (not "OpenSourceDevCon," but "GitHub Universe"). There is a Datadog conference, and so on and so on.
Maybe C just doesn't have one big company, or an ecosystem of smaller ones, that stand to benefit from gathering a bunch of C devs in one place.