I agree that it is important to train against live, fully resisting opponents. However if you believe that it is safe to train eye gouges, throat attacks etc. in a live, presumably contact sparring setting, I think you are underestimating the potential damage of these techniques. The throat especially is an unforgiving target and legally considered to be lethal force. This is not some sort of martial art bullshido thing. It is legitimate. As far as keeping your chin tucked, and slipping eye jabs etc, that's great advice, but if it were infallible no one would ever land a clean shot in boxing.
The other consideration, besides safety, is how practical/tolerable it is to train this stuff "live" on a regular basis. Who is going to come out 3+ times/week to get their face/neck/ears/eyes etc. clawed/gouged/bitten etc. "live" in training? Who is going to roll with someone who gets out of a a mount by grabbing the back of your neck and driving their thumb into your eye socket as deep as it will go? This is no fun at all.
You can train this stuff full speed and almost full force but imo it needs to be in a very controlled setting with the aid of a protective combative suit of some kind. Usually this works better where a designated aggressor attacks and the trainee responds. The aggressor in the suit simulates likely responses to strikes to protected areas (eyes, groin etc) and the attack/response continues until the threat is neutralized or the trainee disengages and escapes. Sparring with it's back and forth rhythm, measuring, distancing, multiple feints, complex footwork etc. is a useful tool. However it bears much less resemblance to a real self protection/fighting scenario than people tend to think.