How do fullstack/backend developers avoid pressure to use a lot of frameworks without understanding how they work underneath?

Do most full stack developers find themselves using framework upon framework to do most things, and not getting enough time to actually understand how the framework actually does the things under the hood? I think in companies there is a lot of pressure to do all things as soon as possible and move on to the next high-priority thing. I want to know if a lot of developers face this, and how they cope up with it.