Bootstrap is not just about making layout, it has so many ready to use components. Which make your buttons, forms look better and give you components like modal

Bootstrap is not just about making layout, it has so many ready to use components. Which make your buttons, forms look better and give you components like modals, popover etc If you are using some framework specific CSS library (meterial-ui for react, primeng etc) you may not need bootstrap you can just use flex/grid + framework CSS library