Removing magic links and forcing users to use templates will result in dispute where editors think that the ISBN does not need to be linked.
And it produces more edits since editors will forget using the templates, so other editors will add them.
The removal of magic links just is producing workload for bots, now and later, when bots have to comb through all articles to add the template brackets whereever users forgot them.
Sorry folks, but the proposal of magic links is the worst idea since the invention of the Internet.