It has everything to do with maturity, motivation and competence. The best teams I've been on didn't care about these rituals because each person bridged the gap with other people. The TLs kept an eye on everything the TL and EM kept an eye on all the people side and concerns. In a startup it'd be the founders. There was mutual trust built by those in leadership roles and issues were communicated and everyone kept an eye out for them.
> They're made of diverse human beings, every one of us, who come from different backgrounds with different expectations about when and what to communicate and when and what not to and around what is who's responsibility when.
Have a meeting, align on some norms for these things and then hold people accountable to them. It's not hard. We're all adults. You don't need constant meetings to hand hold people like little kids.