One bit of nuance my original comment leaves out is how flexible the citation policy is. Yes citations are required to include content on Wikipedia if it’s not considered common knowledge, but also it’s not that hard to produce something that Wikipedia can then cite, even if it must be referenced obliquely like “some people say X is true about Y”. This is generally how Wikipedia deals with controversial topics today: cite sources expressing views in order to acknowledge the existence of disagreements and also keep disputed facts quarantined in “controversy” sections.
One bit of nuance my original comment leaves out is how flexible the citation policy is. Yes citations are required to include content on Wikipedia if it’s not considered common knowledge, but also it’s not that hard to produce something that Wikipedia can then cite, even if it must be referenced obliquely like “some people say X is true about Y”. This is generally how Wikipedia deals with controversial topics today: cite sources expressing views in order to acknowledge the existence of disagreements and also keep disputed facts quarantined in “controversy” sections.