Averages of batsmen vs bowler are never a good indicator of how they actually played against each other. It's never a one on one duel. Fir instance in matches vs the two W's, he wasn't even dismissed by them that often. These types of stats are generally irrelevant.
Lara, as much as I love him never really impressed me against top attacks apart from McWarne. I don't think he ever got a big score against the W's or against Donald. I remember being constantly disappointed by Lara when he faced Donald... Used to anticipate their duels greatly, but it never once ended in Lara's favour. Tendulkar was never terrible against anyone and produced at the very least a couple of outstanding innings against each great attack he faced. Chappell's stats do look outstanding on the surface I agree, but I didn't watch him play at all so no judgement to be made there.
I think it depends on the expectations one has. For me, you can replace Lara's name in your quote with Sachin's. I would hear the talk in media about Sachin being second only to Don, and then I would see he and his team being blown away by Donald for totals of 100 and 66 etc. I don't recall seeing him have a stellar series against either Donald or McGrath, like the kind of series he had against Aus in 98 when McGrath was absent. I would see him and his team being very vulnerable against these bowlers. I think he had very ordinary stats whenever these bowlers were in the opposition playing XI. For a long time, this was true even in big ODI matches as well. WC 1999 super-six match between India and Aus comes to my mind. It was a very crucial match for both sides. Tendulkar had scores of 100,15,80,143,134,141 in his previous 6 ODIs against Australia, with one crucial factor (for me) - McGrath missed all those matches. In a dazzling display of fast bowling, McGrath removes him for a duck.
After seeing batting line-ups getting frequently pasted by the great WI fast bowlers, I always longed for a batsman who would take on such fast bowlers and dominate them successfully in Test match cricket - at least in 40% of their encounters. To my eyes, neither Sachin nor Lara fit the bill. Both have their own short-comings.
Viv Richards and Gilchrist (in the early part of his career) did that with some consistency. But in general, I found flamboyant batsmen being very vulnerable against great fast bowling attacks. Grinders (like Steve Waugh or Gooch or Allan Border) seemed to do better against these attacks than great strokeplayers.
Batsmen vs Bowlers stats do have some relevance. For example, if Tendulkar's average of 62 against Australia in McGrath's absence, collapses to 37 in McGrath's presence, and McGrath has bowled an average of 20 overs per innings in those matches, then McGrath's presence certainly must have been a factor (directly or indirectly) for the fall.