Even after 40 years of photography, I’m still sometimes taken aback by what a difference the same photograph can have depending on its presentation. Color isn’t just a tint. Color is a visual “thing.”
If you have a bright bouquet in a picture, the viewer’s eyes will automatically be drawn to it. That’s fine if that is your intention, but sometimes, there are other things in the picture you want people to notice. The sky and background elements can be the “real” focus of the picture.
Black and white pushes viewers to see the angles, shadows, and texture in the pictures. Not every pictures will look equally good in both formats. You need contrast, perspective, and shapes to make a black and white picture really “sing.”