Unless you're going to tear down the walls / ceiling (depending on how the wire is run) to get a look at all of the wiring for that socket, you'll never know the condition of the wires. If there is compromised cabling, it won't matter what's plugged into that outlet.
The biggest thing people will need to learn is making sure you're not pulling more power from the outlet or surge strip than one should. You typically won't run into this unless you have splitters galore in your outlet while trying to run 4 1000w devices. Same for surge strips and extension cords. Make sure you get the proper rating for what you're going to pull.
The only time a profession would be needed, IMO, is if you're going above and beyond a grow tent (i.e., you're turning a large room that will be running a few thousand watt lights) to make sure your electric consumption isn't going to cause an issue, and to breaker it properly.
Aside from that, making sure your cabling is secured and has enough room for movement for things like lights so there's no stress on the plug or pins is an easy, yet important thing to do.
Here's a site with the most common causes of electrical fires:
https://www.firerescue1.com/fire-pr...-causes-of-electrical-fires-olFt6TUMOsWg7re2/
But yes, secure your cabling and ensure there's enough slack for devices that move (like lights) :P