Godaddy are literally in the business of selling domain names. The other person searched for it and bought it, while the HN poster did not buy it. Did they expect GoDaddy to keep the domain reserved for them somehow?

the accusation is that the mere act of searching a domain on godaddy increases the likeliness of it being sold by godaddy to some shady squatting service. the rebuttal is yeah because we use your searches to power our suggestions. the advice stands - don’t use godaddy to search domains if you don’t want them to get squatted (or don’t use godaddy to search unless you’re ready to buy then and there - or just use namecheap instead as they apparently don’t use your search history in this way)