While there is no doubt whatsoever that flying a tail dragger will make you a better pilot as you end your PPL course the practicalities of this course of action may well drive the decisions as to what to do.
Tail Draggers are harder to find and usualy more expensive to fly so the cost of traveling to a distant airfield to fly an aircraft that is more expensive may well result in flying a tricycle gear aircraft to obtain the PPL and then spending some time after the PPL course learning to fly a tail dragger.
I can’t see how this course of action would make you a worse pilot than one had done all the training on a tail dragger, in fact as flying experience is vital for a low hours pilot this course of action could well put more flying time in the log book for the same amount of money than training exclusively on a tail dragger.