For any X, getting rooted is still often a matter of someone with 1000 botnet nodes to burn running a for loop against an IP range. At which point, your odds of getting rooted are the product of how desirable that target is to write for loops against and how long it has been since you last applied security updates.

The reason WordPress tends to be root city is that there are a great many installs out there, of which many have never had step one done to harden it, and were last given security updates ~ when they were installed.

I would still outsource WordPress, but that's mostly in the vein of "the cost of outsourcing is less than the cost of me having to think about it one hour a month, while 1 hr/mo is a reasonable floor for the time cost function, but the actual value will probably exceed that at least once in a given year."

A WPEngine subscription costs $30 to "I don't care, why are you wasting my time with numbers this small." Developer time costs between $75/hr and "everything is on fire and you can only put out one fire at a time." Ergo it makes economic sense to configure nginx / DNS once, then outsource further complications to paid external support.