Yes but Walton was relatively healthy in 85-86. And so was McHale. The question was IF THAT 85-86 Celts team was healthy, in which they were healthy in 85-86, how would they do vs the healthy 86-87 Lakers? IMO looking at Walton's whole career is irrelevant. You should look at what he did in 85-86. Walton was so good in 85-86, that vs Houston, on a per minute basis, his stats were superior to Robert Parish.
McHale had a broken foot in 87. He didn't have it in 86.
And you're right - we are talking 85-86 Celts vs 86-87 Lakers. That's fantasy basketball. Great matchup.