The answer to the OP's question is highly subjective and the reason why no one is right AND everyone is right - at the same time.
I started with plastic buckets for about a year, went to glass for 15+ years, and recently went back to plastic buckets. My physical situation dictates that the load I carry be as light as possible AS WELL AS capable to be carried on either side of my body and not directly in front. Plus, the higher the lifting point of the container the better for my body. Plastics are light and buckets comes with a handle about 2 1/2 feet off the ground so they fit the bill very well.
I LOVE glass carboys - my favorite for watching fermentation and ease of mind. I still use them for long term aging and wine making but I have to have my brother-in-law move them for me when I have to span any sort of distance. I dislike cleaning carboys because I believe in a good scrubbing and it's PITA to do so with a 1x1" contact point of a carboy brush. I'm very careful with glass carboys because I don't want to die or have large open wounds closed up.
I LOVE plastic buckets - they have given me back the ability to brew with confidence at my leisure. The beer I've been producing in my buckets has far surpassed anything that came out of my glass carboys, but that's not the carboy's fault

. They are simple to clean and getting a good "scrub" on them is equally as simple. I've very careful with my plastic buckets because scratches are a real concern and I don't want a sour when I don't want a sour

. I treat them with the same care I treat my glass carboys, but am less worried about emergency hospital visits.
So to the OPs question: Yes, glass carboys are better than buckets
in some circumstances AND buckets are better than glass carboys
in other circumstances. It comes down to your individual circumstances and the reason why the answer is so highly subjective.
For the record, I currently have 3 plastics buckets full of beer and 4 glass carboys full of wine, fruit wine, and mead

(oops, I forgot about my open stainless fermenter with another wine fermenting)