Why would you need to go through all that trouble when a wired 360 controller does the same exact thing, but with none of that hassle. As previously stated, you literally plug it in to your PC and start playing games.
The 360 Controller is fine if that's what you prefer to use.... You could also say why use a Steering Wheel, Arcade Stick or a Flight Stick? People like em.
It's not that much hassle. The combo of Touchpad & Gyro Aiming rivals a second Analog Stick. You can also play Flight / Space sims using the Gyro or as a Steering Wheel for Racing games. If you want.... It allows you to play PC games the way you want too.
Me personally it's my goto Gaming peripheral. Yeah of course it won't be for everyone.
I had a steam controller...and it sucked. I thought it might be good for FPS games or games that didn't support controllers...it just didn't work well. It is also bulky like the original Xbox controllers. It took way too much work to try and get the controller configured right, and it still didn't work well.
There is a learning curve. At the end of the day use whatever you're comfortable with.
i think the steam controller is for people who want a fully programmable controller. outside of that, an xbox controller works perfectly fine.
You can use it as a normal controller per say. However it can replace the Keyboard & Mouse for many Titles and offers Gyro movement in flight/space or driving games if the user chooses to play like that.
I'm not here is to say it's the best and all must convert to the Steam Controller. The thread was asking if there is a reason to purchase a Steam Controller if you own an Xbox Controller and I listed mine.
I have some 360 Controllers for my Steam Link when guests are over. As for when I am playing Solo or Online I goto the Steam Controller.
If you want deeper controls.... Consider it.... Of course it's not for everyone. Also like I said Steam now offers many of the customizations for 360/One, PS4 and other Controllers. Look in the Controller settings in Big Screen Mode.
I can still play with KB&M or many types of Controllers.... It just depends. Just the more I use the Steam Controller and tweak settings for the various Titles I play the more I dig it.
For me it's like a right blend of the KB&M with Wiimote (which I loved for FPS) like aiming and such.
I think the videos I linked present more than enough evidence if the Controller is the right peripheral for you or not.
Use whatever makes ya happy. If it looks bad don't bother with it. If it looks neat, give it a whirl. All I can say.