Because part of their job, if they are good at it, is to present some data, measure how customers are responding to it, and then tweaking said data to get a better response. If you make it too hard for them to “tweak” it, then they will be more reluctant to tweak it. Thereby doing a poorer job.
Them being able to easily change the website is critical for them to be able to do their job. As in most things in life, it is a balance that needs to be achieved and not one thing that trumps everything else.
As others have said, WP gives them a way to easily change the data that they are responsible for. It should be the devs/systems engineers responsibility to make that data present as a static web page using plugins or caching layers and that should be transparent to the marketers.
Them being able to easily change the website is critical for them to be able to do their job. As in most things in life, it is a balance that needs to be achieved and not one thing that trumps everything else.
As others have said, WP gives them a way to easily change the data that they are responsible for. It should be the devs/systems engineers responsibility to make that data present as a static web page using plugins or caching layers and that should be transparent to the marketers.