Completely disagree as a native English speaker. "Please do foo" is polite. "Please pickup milk after work", "Please forgive me", "Please create a SSL cert for your website".
Tangentially: Same thing happens in code reviews. People become extra soft at objective reasoning!!! The onus is on the offendee, not the offender. Stop being offended so much all the time, you'll live a healthier, happier life. Special treatment, feeling of being entitled for politeness is a slipper slope where everyone is being nice to each other and no one can criticize. Nothing gets done. We don't make progress together like this.
Advice to the sender: Be polite, but assertive. Don't make personal attacks.
Advice to the receiver: Assume good intentions, focus on problem at the hand, accept harsh criticism, don't be offended at little things.
The world would be a better place.