Some people might have overwhelming anxiety from any sort of application. Others might not trust their English/ French enough to understand all of the requirements. There are plenty of valid reasons why folks might want to use a representative for their application, given its importance. Maybe focus more on your own, and less on what others choose to do with their resources.
There are also a ton of consultants/lawyers who scam potential clients in to believing they cant do it alone.
I was planning on using a consultant or lawyer as my application is far from straight forward, and vetted a few. All of them said the same thing about my access to my application. I’m too much of a control freak to accept that. One of the lawyers, I left the office thinking I knew more about the process than they did.
None of the steps I've gone through to get to where i am today, was done through some agency. Study visa, study work permit, co-op permit, pgwp, LMIA, and now PR application.
My help has been this forum, reading the immigration officers manual on certain things, GCMS notes, and so far it has saved me thousands of dollars, and every step up to now has been successful. I may or may not get pr on this application and if i dont, i’ll get another one in soon enough.