It is up to you. What I believe is you have ask around to go for more reliable agents not one who wants to keep their client in dark. Post ITA going to be more tedious than OINP.True that ! I think we should never go to an agent. I have already made the mistake. The only reason was I did not have enough time and that is why I went to an agent. When I told them that there are people who have been nominated and they got the invitation the day after, they don't believe.
My question is "do you think it's safe to take the profile from them once I get nominated from Ontario, so that I can proceed with the visa application process on my own ? "
Just refer below tracker. Those who got nominated before 26 May from Feb 16 NOI have ITA already.
https://myimmitracker.com/en/ca/trackers/oinp-ontario-human-capital-priorities-stream-tracker