I also very much value the fact that the safety locks the bolt, but I think the gold standard is a 3-position safety. The thing is, the Tikka is made to a price point where the extra cost of fitting one would probably make it uncompetitive, so they're not aiming for gold with that particular model of rifle. I knew that when I bought it, and it was a compromise that I was prepared to make in order to buy a sub-MOA rifle for well under a grand.
I agree that there's no substitute for proper firearms handling and that any ND is down to the operator and not the rifle. I'm just not sure I'd trust a novice with my T3.