It's also worth noting that this 'failure' can often be fixed by cleaning it. Something you couldn't do when the GPU failed on your own Mac, or the screen delaminated. Computers will always have issues, there will always be a singular thing that people fixate on (Staingate, GPUgate, Bendgate, Antennagate, Screengate...), but I'd take a keyboard that I clean out every once and a while over a lengthily trip to an Apple store any day. To me knowledge, there have been no significant issues arise yet with the 2016+ models, at the very worst you could use an external keyboard. At least you can continue to work and book a repair at a time that suits you, instead of having an entirely unusable computer requiring a 2 week repair.
It is incorrect to claim there is a high percentage of repairs as it is claiming that there's a low percentage. There is no evidence of either. All we can say is that the keyboard has the greatest potential of failing, and it seems to be the main point of failure. There are many people on this forum who have complained, however it is an incredibly small and biased user base. All you can do is look at it objectively, and get one if you need it, by all means be aware of that issue, but don't let it stop you from getting one, as you mightn't buy any computer - if you look hard enough you'll find the issues with the others. A lot of people recommend the 2015, however they have just as many failures if you look through the threads, they just aren't reported as much now as it's 2017 and fewer people buy/use them. Essentially, we expect around a 5% failure rating from any Apple device, whereas most manufacturers operate in the 10-15% failure rate. Given the number of computers Apple sell, 5% is still a lot of devices however it is also much much lower than the total units out there.
“Biased user base”? These problems exist.