That’s difficult to tell, because many players of advanced age have either:
A reduced role, where being a healthy scratch isn’t completely out of line (Take Statsny for us last year as an example)
or
A tendency to get injured, where even minor injuries could cause them to sit for a game or two. So even if they could play through it, they’re sat out of a game to not only recover from the injury, but to get some rest between games.
The first doesnt apply to Burns, and the second won’t happen because of the iron man streak.