There’s about .. 24 or 30 shortcuts, yeah (mostly shown in the rightclick menu). In practice I find these match the core actions I do (new task, new subtask, edit task, start/stop time tracking, add notes, mark as completed..).
The new window thing bugs me too (but probably for different reasons, as a designer I think it’s the correct choice and they should have just made it faster, probably by using GTK+ instead of Qt)
It sounds as if you think either that an instrumentally rational person will not disclose beliefs that have social cost, or that they will change their social situation so that their group doesn’t assign social cost to those beliefs. The former is insufficient if you value improving the rationality of people you know; The latter is extremely slow and highly susceptible to external influences.
To me your claim just defines ‘instrumentally rational’ so narrowly that there would be no instrumentally rational people in existence. I don’t find that useful.