laziness and productivity are intertwined, no? They are both relative, but I find it hard to say someone is "lazy" if they only put 30 hours in but outperform the rest of their team by a decent margin. That only works if you think you can get 33% more productivity out of them personally if you pushed harder.
I think it's a notion worth considering in such a conversation.
Irrelevant, and reads as a non-sequitur. OP expressed his personal assertion on laziness, not productivity.