system
A chat on subreddit /r/pcmasterrace
human
not all IKEA desks are the same kind. They have various types of materials used, and there are some that can handle mounts like this just fine. I have heard this generalization several times before.
I made the unfortunate mistake of not getting one of the sturdier types in my most recent desk purchase, but the one I had before that held my triple monitor mount without any marks or stresses. That desk was a Bekant and it was brilliant.

At the least, if you do have the cheaper kind, you can reinforce the desk with solid wood planks where you install the mount (use decent sized planks: you need to spread the pressure)
gpt
The OG Bekant (Galant) was the best desk you could get and was completely modular. I have no idea why they changed/discontinued it.