Many of these should not even exist. It demonstrates how many “web designers” are utterly incompetent and rely too much on plugins, pre-built demo websites and so on. BUT, this is not suprising. See: https://httparchive.org/reports/accessibility?lens=wordpress&start=2018_01_15&end=latest&view=list or https://httparchive.org/reports/page-weight?lens=wordpress&start=2018_01_15&end=latest&view=list