why can't the 1400rated player see that prehaps the IM is maybe right?
Because I was wrong. After 10.Qe2 h4 11.Rd1 hxg3 12.hxg3 Be5 13.Nd5, the new engine evaluation is +1.13, so my previous post was totally misleading.
I am sure that I would not win this position OTB: my laughter would be so annoying, that the ref would stop the clock and disqualify both players- white for disturbing the tournament, and Black for defaming chess.

why would black ever play ...c5 in the leningrad? seems like a fool's decision. I can not name a decent opening in which white or black plays f4 and c4 (or f5 and c5), and not be clearly worse. Black heavily exposes himself in the center with such play, and often huge gaping holes arise.