A lot of good points here. I figured this out myself ages ago and have done well to actively halt the 'only do things that are maximally productive' behaviors that actually cripple any productivity at all.
As one example amongst many: I wasn't taking the garbage out until the mail arrived. Because that was optimal! Maximize efficiency! Except it doesn't really help. Taking out the garbage takes 20seconds. Going to the mailbox and bringing in mail? 20 seconds. Doing them together and juggling bins, mail and doors? Over a minute. Not to mention the many minutes of distraction from the mental weight of a chore needing to be done. It's only theoretically optimal and the theorizing part itself is crippling.
Likewise I'd let myself get crippled by 'there's a meeting in 20minutes'. I'm sure it's a huge problem for others in the wfh era. I wouldn't start washing the dishes because i might be in the middle of it when i need meet with others and then with the stop and start that'd be less than optimal. But doing the dishes, even if slow turns out to be a 10 minute chore. I should have just done it. But i procrastinated because theory crafting told me that it'd be slightly less than optimal to do it now. Meanwhile i just waste those 20minutes on Hackernews. Even being less optimal i'm always better of doing it now.
It's definitely helpful to be aware of these behaviors. I think the focus on maximizing productivity affects the geek types more but it's absolutely crippling to let yourself go down these paths. Don't do it and you'll be better off and more productive.