In my humble opinion, yes. I’ve had teenagers and adults (mostly ladies) who have had years of previous training, come into my studio with very pretty voices.
They have perfect diction with clean smooth onsets, optimum posture and breath control. The problem: minimal chest voice and pharyngeal twang.
This is not a balanced voice to my ears. This is a classically-trained voice with a top-voice down approach through the bridges. Unfortunately, this type of training doesn’t set students up very well to sing other genres of music including opera and contemporary musical theater.
Comments or questions? Are you having trouble making the sounds you want? Do you have previous classical training?