Granted, I'm sure the average engineer will be very relieved to find out they're paramount to production.
This is actually pretty apparent if you camp a web forum. People seem to either need a raspberry pi or a data center: this is the typical web-app vs mmorpg divide amongst possible computational fantasies people have. Questioning what motives people have is very sensible.
Go grab a similar server from Hetzner or something.
It's worth repeating, if only to raise awareness among devs that modern computers are _extremely_ fast. You can start a new one with commodity hardware and it will probably serve your needs for the lifetime of the project. If your project gets so popular/successful that you need more than a single machine, then I would hope by that point you know how to move it onto a cluster of machines, or into the cloud if the economics make sense.
I say "most web projects" because it's true - most web projects are simple CRUD apps in slightly different forms. Sure, there are some up-and-comers using AI to burn half a data center to produce fake comments and images for internet forums. Those won't run on a Pi or single mini PC. But people are making _so_ many web apps that will never see more than a few hundred or thousand users. Those don't need multi-instance load-balanced highly-available infinite-scaling systems to serve their users needs. That usually just adds cost and complexity until you're at a point where you _really_ need it.
Yet, for some reason, I see this repeated everywhere, always. Does it make the people who repeat it feel better? Are they actually informing anyone of anything? Who knows.