I'm reminded of the author of BDS C compiler. He didn't know how other compilers worked using multiple passes, so he wrote one that ran in a single pass. The result was smaller (important in the 80's) and faster than other compilers.
Because while I exactly agree (and while that's always cool with Paul B!), I think ESR factored into git indirectly in a way. Provided part of the impetus to want to rewrite things.
Think about it: maybe the most important thing in that email is that ESR lightly compared Linus to Ken Thompson and maybe that kept him thinking along the lines of rewrite everything. All the dialogue factors in, I think ultimately..