Companies absolutely DO NOT want TWO games ready to release at the same time because the marketing attempts will cannibalize each other. So, when one game takes longer to develop than expected, and a release slot opens up, another game must fill that slot, even at the cost of quality, because releasing multiple games at the same time is untenable.
Blood, Sweat, and Pixels covers this in great detail: https://www.amazon.com/Blood-Sweat-Pixels-Triumphant-Turbule...
https://www.amazon.com/Blood-Sweat-Pixels-Triumphant-Turbule...