The only criticism I’d make is that patching drywall is dead simple and cheap and so your solution seems possibly a bit overengineered (and, while I’m at it, that Andreesen’s observation is both facile and meaningless and is probably a reflection more of the bids Marc Andreesen’s house manager gets than anything insightful about labor costs in America).
I’m happy to pay for software, but I really don’t care for subscriptions. (Why no, holding back the tide is not going well at all, why do you ask?)
The challenge with the example is that “success” is personal preference. With plenty of examples, the success criteria are external.
The biggest actual problem would be in a fire, the PLA will burn and let the fire into the wall cavity, where drywall would maintain a barrier for much longer - that is why we have drywall in the first place, it is a decent fire barrier.
A person who goes to eg hang a picture frame or shelf there will encounter a different material with different load bearing properties than expected. Pushing into the center of that area with EG a drill bit will not have the same physical response or give, and depending on how it was braced/integrated with the surrounding wall, the patch itself may be pushed or pulled out of place. Similar for anyone that leans on that area if it's at such a height.
I suspect that this procedure is faster and easier than taking a 3-D scan of the hole, 3-D printing a PLA patch, and gluing it in, but it does require most of an hour and the appropriate materials on hand.
Crucially, even if you are completely unwilling to take a stab at a fix yourself, hiring a local handyman to patch a hole via some good enough technique should still be far cheaper in most places than buying a nice new TV.
But nothing is gonna ever beat buying a 2nd-hand framed picture or plaque or movie poster or grabbing a flyer from the junkmail on your porch and tacking it over the hole... And if you're determined to fix holes with a TV, you can probably find one used for about as cheap / free as any of the other choices. Which is what makes this such a stupid example - the cost of TVs, like framed images or furniture, spans from $0 to "as much as you're willing to pay". Hiring someone can also be arbitrarily expensive, but can by definition never be 0. So the comparison is rhetorical trickery and demonstrates nothing.
...other than, apparently, Andreessen's dissatisfaction with paying tradespeople.
What does the HN panel say? Is it a solution? Or does it have any downside?