When working with electronics, I use the CS vs EE analogy.
CS person: grabs part by hand, shuffles across the floor in socks, brushes dust off a pin, presses part into place
EE person: stares in horror, a grounding strap dangling from their hand
CS: "What?"
EE: "You know you're supposed to ground yourself to prevent static discharge from frying parts?"
CS: "Bah, it worked fine the last time I did it this way."
Point being there's a difference between something that works 99/100 times, and something that works 60/100 times. And when failure means a dead part, probably best to go the extra mile.
Being one of those "EE persons" specialized in semiconductors seeing lack of ESD protection drives me insane. I used to work on an electronics factory production floor where it was required of me to take a certification course of proper handling procedures and in the use of ESD arresting equipment.
Your PC build didn't boot? Probably shocked it. It's blue screening or kernel panicking? Probably shocked it.
As someone who rebuilt a couple dozens PCs for a charity from dumpster parts, boards in plastic bags while wearing mostly synthetic clothes, I'd say you underestimate the ruggedness of those things.
Drivers and OS are much more likely to be the cause of quirks and weird behaviour.
Whether you're likely to experience ESD problems depends very much on the environment; if the ambient humidity is high enough and you're not wearing rubber soled shoes on a synthetic floor, it can be very low.
CS person: grabs part by hand, shuffles across the floor in socks, brushes dust off a pin, presses part into place
EE person: stares in horror, a grounding strap dangling from their hand
CS: "What?"
EE: "You know you're supposed to ground yourself to prevent static discharge from frying parts?"
CS: "Bah, it worked fine the last time I did it this way."
Point being there's a difference between something that works 99/100 times, and something that works 60/100 times. And when failure means a dead part, probably best to go the extra mile.