Yeah just one perusal of any of the Atlassian feature request forums will justify that.
To be fair though, Atlassian is dreadfully slow to implement features people actually want (Confluence still can't render markdown, that was requested like 8 years ago now), so they kinda deserve it
They removed support for their own markup language and then closed a bunch of the "please give us markdown support" tickets as completed like a bunch of dumb, dumb, dingleberries
Which is fine, except their format sucks, and I never want to use it. Markdown is a pretty standard documentation markup* language these days, and there are ton of libraries they could just slap into Confluence and render it as-is.