You are so uninformed it's not even funny, Are you really saying that, for example, Red Hat ($2.4B in revenues in 2016... btw the B stands for billions) is unprofessional? This kid...
I work as a web developer. You don't even realize that, just to name a few, Bank of England, Youtube, Facebook, Wikipedia, Twitter, Linkedin all run Linux... and don't let me start on the smartphone market: over 80% of all the smartphones on the planet run a Linux kernel. I don't expect you know what a kernel is, but google.com (btw it runs on Linux too!) is your friend. Also, check your modem/router: 99% it's running Linux...
If you had to "study hard to learn the ECDL" I honestly feel sorry for you.
Funny that you ask... I actually have a Red Hat Certification! If you found the ECDL "hard", a RH certification must look like an impossible challenge to you.
If you don't mind looking like an idiot, you should really tell Google, Facebook and so on that they are running their businesses on an OS not meant for professionals! It should provide a good laugh to them