I still don't get it. If your tires were Pirelli tires might it have been a non issue then? Isn't Michelin tires poor performing in wet conditions? Wet conditions in the summer time simulates wet conditions in the summer time. Didn't you say in previous posts that winter tires have and advantage because of their grip in the cold weather where summer tires lose their grip below a certain temperature? Wet conditions can occur both in the summer and the winter.
I have always stayed away from Michelin tires because of my experience in wet conditions, they always were poor performers compared to other makes of tires.
I remember my first Porsche had Michelin tires. Everytime it rained in sunny Cali, it was the equivalent to driving on ice. Switched over to Dunlop and the problem was solved.