Seems a bit harsh to dismiss an entire class of telescope based on one night of poor atmospheric seeing. The C14 is used extensively for planetary imaging, Damian Peach, Christopher Go, Darryl Milika (to name a few) all use these with spectacular results.
https://www.damianpeach.com/
https://www.celestron.com/blogs/team...christopher-go
https://momilika.net/WebPages/AstroIntro.htm
Remember that planetary viewing and imaging require significantly better atmospheric seeing than your standard DSO, and the larger aperture is looking through a larger column of air than a smaller scope. When the seeing is excellent, there aren't many commercial scopes that can extract the same level of detail in the planets.
I use a Celestron C9.25" SCT for my planetary imaging, and while the images are not as detailed as what you can get with a C14, they are good enough for me.
https://www.cloudynights.com/gallery...-solar-system/
Andrew