It did even more damage to historical accuracy in film
Because Braveheart had established such a great precedent for Mel Gibson historical films.
Seriously, the Battle of Stirling Bridge without, well, a bridge? Basically, Stirling Bridge was portrayed as what Falkirk would've been if it had worked, and Falkirk portrayed as the time-tested strategy of "Bad guys over there. Run at them with sharp sticks."