This is actually good advice.

I read that any more than 4 meetings per day was too many, this seemed like decent advice. The reason was context switching, which makes sense.

I know that if I get all my meetings done in the morning, it gives me a run at the afternoon uninterrupted or be it, dedicated interruption time if that's what's needed.

So I've blocked out my afternoons for "focus work", meaning, you can now only book time in my diary in the mornings.

This means meetings are now tightly packed together. No Swiss cheese. You could argue however, there's very little time to reflect, but I've yet to see negative effects of this as most of the meetings I'm in are set up to make decisions there and then, rather than to distribute information.

I do finish my focus work time before the end of the day, incase anyone needs to book in an end of day catchup or otherwise check in.