To be eligible under any PNP, you should "intend" to stay in the province of nomination. If either the province or IRCC or officers at the immigration counter when you do your "landing" find out that you don't "intend" or you have "never intended" to stay in the province of nomination, you might face dire consequences. The former might result in you being denied PR and the latter might entitle them to book you for misrepresentation because you lied on the application (by telling that you do intend to stay in the province of nomination).
Having said that, after you become a PR (once you complete your "landing"), you are protected by the Canadian Charter of Rights and Freedoms within which there is a section called "Mobility Rights". These mobility rights enable any citizen or Permanent Resident to work, move and live anywhere in Canada freely.
IMO, every provincial nominee has a moral responsibility to fulfill - to at least try to establish themselves in the province of nomination because the province has spent resources to nominate the individual. Using PNP as a backdoor entry into Canada is nothing to be proud of and discouraged..
Good luck and all the best!