And what if they want to be oogled? She's obviously posing for the picture. She chose the outfit, she went to a public space, and she posted it online. Who are you to judge?
There is such a thing as exhibitionism - the sexual desire to be put on display. It's the flip side of voyeurism - the desire to be caught in a sexual act by on-lookers. These are legitimate kinks. Are you going to kink shame, too?
This stream is literally the "HornyStream." It mentions lewd pictures right in the description. If you were going to be so badly affected by seeing a semi-clothed woman, why did you subscribe to the stream?
She is a beautiful woman - and not just for her chest - but forgive me as a healthy straight male if I notice her chest. That is, obviously, what she wants me to notice, so am I objectifying her if I give her the attention she's requesting? As long as I'm not an asshole and treat her with respect otherwise, am I hurting her?