I agree with your opinion, and of course critiques are always welcome here, but your comment does seem unnecessarily snarky. Perhaps something like this would be more in keeping with the HN guidelines:

"It seems like a big risk to allow a little-known cloud service to authorise SSH access to your laptop. What are the use cases for this? What do you need to be careful of?"

If you're going to start your sentence by the heavily condescending "Yeah, what a great idea", then don't pretend you don't understand how that could be against the rules. You can't have your lunch and eat it. Especially if you're not going to provide some facts / hard evidence to back up your assertion that this is, in fact, not a good idea.