Yes. Because it lowers the chance compound risk. The longer you go without stressing the system the more likely you will have a double failure, thus increasing your outage duration.

Simply put. You don’t want to delay funding out something is broke, you want to know the second it is broken.

The the case I am suggesting, a failed release will be often deploying the same functionality, thus many failure modes will result in zero outage. It all failure modes will result in an outage.

When the software is expected to behave differently after the deployment, more systems can result in being part of the outage. Such as the new systems can’t do something or the old systems can’t do something.

Not exactly, but it's worth the experiment in trying things anyway. Say you currently have a release once every few months, an ambitious goal would be to get to weekly releases. Continuous enough by comparison. But 'lower risk' is probably not the leading argument for the change, especially if the quarterly cycle has worked well enough, and the transition itself increases risk for a while. In order for a committed attempt to not devolve into a total dumpster fire, various other practices will need to be added, removed, or changed. (For example, devs might learn the concept of feature flags.) The individuals, which include management, might not be able to pull it off.