yes to this a 1000 times! It's amazing how our familiarity with certain interfaces changes our behaviour too. Anything that resembles a chat box and a "hit enter to send" encourages chat like behaviour. No matter whether it's threaded or otherwise. Interfaces like Jira or other software management tools which have ceremony involved before actually creating a task encourage people to think through things fully before hitting create.

I'm a huge advocate of async work especially in remote teams. Every real time chat about an importan decision has felt chaotic as people type message after message adding details and leaving out others which causes this long back and forth between people. The end result is always a mess leaving it to someone to go through it again and summarize information.

Messaging is just a bad format for focused conversations. Ceremony and friction are, like you say, a good thing. The physical parallel to this is sending in a request for a meeting with some details as opposed to just walking up to someone to chat with an idea you just had.

Not to say messaging is bad for everything. But it's definitely not good for calm, slow, focused conversations.