Thank you for finding it. I did something similar, but only 2 keys or something like that. I know for a fact that this is not impossible to do, that's why my initial wording was very careful chosen. Its just impractical for most users to do lot of key presses with it, as it requires lot of timing and setup to do the most basic stuff. I always wondered if this pattern can be copy pasted in the file with little changes, to create long sequences in a quick way.

I found something too that is relevant (Counter Strike 2): https://store.steampowered.com/news/app/730/view/6500469346429600836

Recently, some hardware features have blurred the line between manual input and automation, so we've decided to draw a clear line on what is or isn't acceptable in Counter-Strike.

We are no longer going to allow automation (via scripting or hardware) that circumvent these core skills and, moving forward, (and initially--exclusively on Valve Official Servers) players suspected of automating multiple player actions from a single game input may be kicked from their match.

This is not about Steam Input specifically, but that shows what I meant before. Companies have a tolerance level to a degree of automation and that tolerance level is different from company to company, genre to genre and game to game. If Valve made is super easy to automate lot of key presses and make it sharable and searachable, built into the Steam client, then this could be problematic for many games.

Edit: oops, replied to the wrong comment.