A lot of my job is demand-based, and that demand is usually at the front half of my day. Afternoons are variable. Not quite enough work to go around, but a bit too much to just work mornings only and too much to switch to projects due to likely interruptions.
Me? I'm crazy. I'd let half the staff take short Fridays, and split the afternoons for the other four work days so half the people are pure project Mon/Tue and the other half are pure project Wed/Thu.
And I'd definitely have far more WfH. In my opinion, WfH should be the rule, not the exception, wherever you don't have a legitimate need to be physically present, and anyone who can't handle being productive from home can start looking for work elsewhere. This would vastly reduce infrastructure costs for the company.
Except, WfH should not be available to the management team. If anybody needs to be available in a specific physical place for the ability to concentrate or meet with peers... it's management. There's nothing quite so morale-building as a RtO order that doesn't apply to them, and when you try to reach them they're always magically unavailable.
But I'm not the employer, and I have neither the money nor the inclination to try and start up a competing business... so I sit in my seat and try to justify my pay during the average afternoon. If I occasionally goof off because of the lack of opportunity to be productive, that's the company's fault and it's above my paygrade to fix it.