Looks like that patch is 3 months before the WotLK patch. So that’s pretty much the entire expansion of using Engineering. Even then, all that patch says it disabled is rocket boots.
https://wowwiki-archive.fandom.com/wiki/Patch_2.4.3
2.4.3 was July 15th, 2008 and 3.0.2 was October 14th, 2008. That’s according to wow wiki.