There is nothing wrong with shaving with whatever you like.
My main gripe with carts is the fact that most are multibladed. If you avoid the popular Gillette and Wilkinsons, cart shaving does not even need to be expensive.
The last multiblade cart I used was a 3 bladed Croma, it was cheap and was smoother than the fusion (for me). However, it still pulled rather than cut hairs from my chin.
However, I can happily start the day with a Gillette Guard.
Joris (not the razor). If you consider it as a hobby, you shave for free.