Windows will not use the page file unless there is no available RAM.
That's completely untrue and pretty much a myth that's perpetuated throughout the entire internet without so much as a smidgen of proof. Try it yourself - keep your system running for a week or so and then check how high your commit charge is compared to your RAM usage. After a few weeks of running with a normal-sized page file, commit is invariably higher than used physical RAM, and guess where the difference goes... yep, Windows pages out all that data to the page file.
This is the exact issue referenced in the article - when you reopen an application that's been minimized for a while, it's been kicked out of RAM into the page file, and if the disk your page file is on isn't particularly fast, it'll take a while for the application to "refresh" properly (i.e. get loaded from the page file into RAM).
The thing is that Windows doesn't only page out stuff when your RAM is full, but also if you haven't opened an application in a while... if you don't want it to do that, the only thing you can do is turn off the page file (or make it small enough that Windows stops paging out data when it shouldn't).
If you don't have a page file and you use all your RAM, applications will not be able to start, they may stop working and/or the system will crash.
Which is why you should keep an eye on your memory usage and make sure you've bought enough RAM. If you don't care about slight hiccups or pauses when restoring applications (or don't mind using shortening the life of a fast SSD with constant paging), this isn't something you need to do. It's for people who are annoyed at every little bit of time they waste waiting for their PC to do something.
For people who don't know what they're doing, your advice is sound. It is, however, not quite technically correct
For people who do know what they're doing, on the other hand, the occasional out-of-memory error (as a hint to get more RAM) is often preferable to the system slowing to a crawl (with the HDD LED lighting up permanently) while the machine pages out multiple gigs of data to disk because you're trying to use 16 gigs of memory on a machine that only has 12GB of RAM installed...