MacOS Mojave, Late 2013 iMac

This is probably a rare event, but it should never happen and if this "feature" behaved consistently with MacOS, it wouldn't ever happen:

The other day I launched Illustrator, and immediately pushed the window down and out of the way so I could access multiple files on the desktop. I didn't realize this was the first time I'd launched Illustrator since an update, so a tour window had popped up, but since I had shoved the entire workspace window down right away, I couldn't see the tour window.

What happened was that I attempted to open files, interact with Illustrator, but nothing would happen. The tour window that I couldn't see (because it was anchored to a window that was mostly out of sight) was waiting for me to take an action on it.

I tried grabbing the window title bar and raising it back into view, but apparently the tour window stops any other actions in Illustrator. I couldn't "grab" the window frame and move it back into view.

I realized Illustrator probably had some sort of window like that open, waiting for input, so I attempted to just hit Return (that should universally trigger the "Okay" button on such a window) but nothing happened. Apparently the tour window is immune to keyboard input, requiring a mouse click.

When I couldn't get Illustrator to do ANYTHING ELSE, I attempted to force quit it through the application manager, but it refused to quit. Apparently the tour window acted like a foot in the door or something. I couldn't even shut down my computer normally because when it got to Illustrator, Illustrator wouldn't give up, eventually having to force it to shut down and then restart.

THAT IS CRAZY. Obviously it's a rare circumstance that the window is hidden but the offer of a tour shouldn't block all other activity except for a very specific mouse click--it's not mission critical, but it blocks any other action than clicking "skip" or "Okay"

That's not the way the OS works, and it shouldn't be the way this window works.