Yes, there are several unfounded assumptions needed to get to this score being evidence of anything.
Other Parker 100 point wines:
2004 Termanthia
2008 Grange
2013 Plumpjack Reserve Cabernet
multiple Torbreck Shirazes
a bunch of wines from Verite
I’d say at least some of these are quite reproducible in terms of quality and style. Some of them must be downright generic tasting (based on other vintages from the same eras of these wines). So, the 100 point score might not mean much at all. This is in addition to the points made in the previous two posts.