I'm not old enough to have ever watched Greaves week in week out although I don't think age is a necessity for judgement. One could be equally blinded by a sense of nostalgia.I haven't disagreed with your post largely because I have no idea of your age and therefore on what you are basing your statements. Your comment about defending being atrocious 'back then' is quite true. Atrocious in the sense that it was cynically brutal at times with no quarter given. Career threatening tackles by people renowned for being the 'hard men' of soccer
Jimmy Greaves at his best would have coped extremely well with today's defenders and to suggest 'modern football training' might have been needed for one of the most naturally gifted strikers the World has ever seen is humorous to say the least. I have had the privilege of watching Greaves and Kane play, both different in style but equally effective at putting the ball into the net.
I totally refute your questioning of his record because of the ' level of defending at that time'. It's an insult to the player and completely wrong. We shall agree to disagree but please do not try to in any way diminish or tarnish the goal scoring feats of an absolute Spurs and England legend.
Going back and looking at statistics from the 40s through to the 60s high scoring draws like 5-5 or 6-6 as well as huge 12-0 victories weren't compltley uncommon.
I get you point but I don't one should equate the brutality of tackles to good defending if you go back and watch some of Pele's highlights you can see how easy it was for him to literally walk through a defense.
Look at the state of the defending in the clip below, Messi would be scoring 8 goals a day.