How do you know? Some of the text has a slightly LLM-ish flavour to it (e.g. the numbered lists) but other than that I don’t see any solid evidence of that

Edit: I looked into it a bit and things seems to check out, this person has scuba diving certifications on their LinkedIn and the site seems real and high-effort. While I also don’t have solid proof that it’s not AI generated either, making accusations like this based on no evidence doesn’t seem good at all