An ecommerce site has a merchant agreement with a payment processor to comply with PCI DSS. This does not. It is in no way similar.
https://www.pcicomplianceguide.org/faq/#4
Disclaimer: I work in governance/risk/compliance, but have not performed PCI compliance work in the last several years.
In terms of what users are taught (which is plainly the context of the comment you are replying to), this website is identical to ecommerce sites.