Basically, this Web design company used a proprietary font to make a website for a client, that they then included as a self-hosted font file for the website that they deployed. They only had access to this font through their Creative Cloud SaaS license, which almost certainly doesn't let them take the proprietary IP they have access to and resell it in a package to anyone that pays them.
I don't think it's unreasonable of the owner of the IP to ensure that their IP doesn't effectively become freeware just because they signed a bulk license with Adobe. It would be like, because you licensed your song to Spotify for a per-play fee, that would mean anyone can rip it from Spotify and use it in an ad without a license?
It also doesn't seem onerous for the web designers to ask their clients to buy a copy of the font that they specified. I've had to do that for websites before.