That is not correct, there are certain classes of LMIA-exempt work permit holders who may be eligible for the valid job offer points, but as 21Goose points out, they have to provide a written offer of FUTURE employment (either permanent, or at least one year, after becoming a permanent resident).
However much you may dislike this requirement, lots of people are able to get such letters and take advantage of this opportunity.
I know there are lot of views on this. Quick clarifications. This is specifically for ICT employee to claim 50 points. It is for inland employees who already completed 1 year in Canada.
I have two letters from employer letter which indicates follows:
1. a Valid WP and an offer letters which is valid for next 3 years ( i.e. till May 2023).
2. A letter which indicates my salary, joining date, designation and also with a status as Permanent. This does not indicates job duties.
Additionally I have reference letter from my manager highlighting 1 year experience to map to NOC code, job duties, salary as well as indicating we like to have him permanent in Canada, of course on Company letter head with his contact details.
With these document is it enough or we need to have a letter which explicitly indicates that "post PR company will keep employee for 1 year". This text is very confusing for interpretation and big corporate companies like IBM, etc.. normally don't want to change the standard structure of their letters.