I think he did what he felt he had to do to be competitive - and that's what all top sportspeople do. Of course some realise that they don't have what it takes to be the very best - but can you imagine the frustration of thinking 'I could be the very best if only the others weren't cheating?'
Whilst we have to give tremendous credit to LeMond for not doing so, his career was drawing to a close at the start of the EPO era, albeit it's end was hastened by the rise of doped riders. Armstrong was then a young rider who had to choose between a career winning things by cheating in the same way as many others were, or a career as a journeyman pro.
Having made that decision and made a lot of money out of it of course he was then massively protective of the lie. What choice did he have? He had more to lose than anyone else.
I don't think it's a decision I would have made, but then even if I had the physical attributes, I don't have the drive to be a top sportsperson, so what do I know about how I would have reacted.
He makes a valid point that he has been punished more harshly than others. I note that Ulrich was not stripped of his Olympic title and is still recorded as a Tour de France winner, for example, as is Riis, whose result not officially has an asterix next to it, whereas Armstrong just had his taken from him.
I don't like there being no winner those years - if the committee can't say who the best placed clean rider was, they should admit that they didn't screen properly and give the title to the person who finished first. Claim the prize money back by all means, but someone won those races.