A lot of people wouldn't agree that changing software is simple. And even simple changes may have to wait their turn in a long queue - plus, they make the queue longer and delay other changes.
WikiTree is built on MediaWiki, the software written for Wikipedia. It pushes the capabilities harder than Wikipedia. MediaWiki isn't the best-designed software and it's being changed all the time by its writers. Probably not a good idea for 3rd-party users to mess with its internals.
Logging a Save when nothing seems to have changed is probably a deliberate feature, because Saves are magic in MediaWiki, they make things happen behind the scenes.
In any case, templates are powerful things in general, and a template change could mean that you'd want to revisit profiles. Software can't easily tell which changes are harmless.
There's probably an expectation that you get a template right before installing it and then mess with the live version as little as possible.
Having said that, you can probably ignore any log entry that just says "edited the data". If anything's been changed explicitly, it will say "edited the Biography" or "edited the Father" or whatever.