Why not?
As Bs65 said, no one can say for sure but based on sentiments in the forum score should breach/touch 400 by end of the year. So if we go by the sentiment it may not be May but by end of the year you should get your ITA.
Having said that I do not like uncertainty and I would have been in your shoes:
1. If I would have got a nomination from Ontario, I would have still applied for it.
2. If there is an option to get nomination from another PNP program (SNIP), I would try that.
Best of Luck.
Cheers!!