You are right, I personally think tanner is hot, but he certainly doesn't compare to a lot of the fuckboys on social media these days. The girls he goes for are social media climbers the types that he only has access to because of his sub count and views, they usually have a couple hundred thousand followers on their own and are trying to be models or influencers , he dms them being horny and they see who he is and start talking to him because they know if they get with him they get to be in his videos, and the horny 12-15 year old boys that are most of his viewers will follow them and they can get boosted in terms of numbers
For instance before this current girl Tanner dated Taylor she had previously been with Mikey Barone and Taylor Caniff prior to being with Tanner but that didn't get her much because most of their followers were teen girls not interested in her or following her
She got with Tanner in 2017 and her insta and youtube numbers went up significantly
Taylor wanted to be with hot fuckboys like Mikey Barone, but they don't translate to her increasing her own following which is why she went for Tanner a comparably uglier guy