Training to failure is training to fail.

I read this online a lot. That when you work out you shouldn't push any set to the point where you can't do any more reps ("failure") because it's training your body and mind to fail. That instead you should quit every set a few reps before you fail, for example three reps with a weight you could have done five with or one rep with a weight you could have done three with. Well, that's for chickenshits. You should give everything you have when you work out. Practice like you play. I'd rather be trained to fail than trained to quit.
Maybe that means you won't get to work out every day because you'll be too sore. Well suck it up, buttercup! Try getting in shape instead of deliberately pussifying your workouts. If you're afraid of discomfort find a new hobby because this one ain't for you.
Most of the dickheads who are actually training this way in the gyms are doing five reps with weights they should be doing 10 with and could be getting 12-15 with if they put any genuine effort into it. What the fuck?! Half your effort? That's the very definition of half-assed.

Who do you think is going to quit first?

It won't be the one willing to go until there's nothing left.