That's just Bee's opinion, for what it's worth.
A person has to learn for themselves, when all is said and done. Just watch your different breeds and find out for yourself what works for your flock goals.
Some folks don't mind having fat hens that don't lay as well as other breeds because they are pretty and look like a Butterscotch cake and they find that is enough for them to warrant keeping them....even my granny kept a few chickens just for pretty.
I'm just a little more...um...
frugal and practical in my husbandry goals than even my granny was...heck, she was old. She
earned the right to have a few worthless breeds in her fine flock of layers just to keep her amused!
She had a few with hairy feet and one that had a top knot...made her laugh to look at them.
Sometimes a gal just has to have something for pretty or for fun, so I don't fault folks their choices.
Making the core flock out of those breeds is probably not a good idea, though, if you want a good backyard flock. Good layer breeds are just as pretty in my eyes, plus they earn their keep...what more could you ask?