They aren't shortcuts, they're replacements for mouse clicks, and you have to do the same number of key presses as mouse clicks.
I don't have Windows open in front of me (still the holiday weekend). In Word, to paste text from the clipboard, unformatted, into the document by "pressing the alt key to reveal" the so-called shortcuts go something like this:
- alt
- H (I think, to further reveal or expose the Home "shortcuts")
- V (to expose the paste functions)
- S (because we want to paste Special)
- U (unformatted)
- and maybe U again to get the other flavor of Unformatted.
That's five or six keystrokes, and that's not a shortcut. It feels like passive aggressiveness on Microsoft's part: "Oh, you don't like clicking? ... There, I fixed it."