An honest assessment.
WHEN A BUILDER IS JUSTIFIED
You need layouts your theme does not offer You will build many custom pages Nobody available can write code Design control matters commercially
WHEN IT IS NOT
Your site is mostly posts and standard pages The block editor achieves what you need Speed matters more than design flexibility
THE MIDDLE PATH
Use the block editor for most content.
Use a builder only for the handful of pages where design genuinely matters.
That limits both the weight and the lock-in.
WHAT TO WEIGH
Design flexibility against speed, cost and lock-in.
FOR A SMALL BUSINESS SITE
Frequently a well-chosen theme plus the block editor is sufficient.
FOR A MARKETING-LED SITE
A builder may earn its cost.
WHAT TO AVOID
Installing a builder because everyone does Building every page with it out of habit
THE QUESTION TO ASK
What does this page need that the block editor cannot do?