There is a gigantic market of vendors choose from, and sometimes it’s easiest to just say “We’re going to avoid vendor X because they create risk for us.”
The above poster didn’t say he’s banning HPE, either. Just HP. I doubt anyone will really suffer from banning HP products.
We have a policy of only buying Brother, Epson, and Canon desktop/office printers with an exception for Lexmarks that are laser printers and have specific built in features. It means a lot less drama supporting them and getting supplies (even though we only use OEM supplies, or else get service and supplies through a click charge maintenance contract).
There’s still a fleet of ancient HP printers, including a workhorse 20-year-old LaserJet still printing 11x17 sheets.