The text associated with the tooltip is helpful early on but becomes
an annoying visual nag once you are familiar with what that thing
does. I had tooltip-mode set nil. I didn't expect the echo area to
contain the tooltip. There was text in the echo area and I couldn't
get the modeline context menu out of the way to read it. When I
restarted in 'emacs -Q' to report the bug I discovered the echo area
partially contained the tooltip text because tooltip-mode is default
on. My point is if there is text I want, I want to be able to read
all of it. If I've set tooltip-mode nil then I expect tooltip text
masked out from every output channel.
So you are actually asking for a new feature, whereby the tooltips are
not shown at all, is that right?