Edited for better clarity
To quote the article,

The clip shows Levine was singing "Sunday Morning" with his eyes closed as the fan rushed toward him. He was visibly unnerved when she touched him, and as security removed her from the stage he shivered and mouthed the word "fuck" to the audience.

And still, more of the public's attention was focused more on his reaction to the fan grabbing him (which wasn't wrong in any way according to me), than on the woman violating the singer's boundaries.

Even though this was a clear violation of a person's boundaries, the singer's reaction to it still received backlash that he had to actually make a video to address the criticism...

The notion that a "man is always ready for it" should be challenged.

p.s.: Adam Levine is chief singer/songwriter of the pop band Maroon 5