Because none of them express solo lane dominance?
Literally the closest to viable we have for that is Pyke mid, with a 51.2% winrate and a .7% pickrate. Yes. Point seven. That's not a typo.
And Pyke is the best performing hook support in any role but support. Thresh doesn't even reach a 40% winrate outside of support, and Blitz only does so in mid (with a less than .1% pickrate). Naut has decent winrates in top and mid, but has a combined .4% pickrate between both lanes. And I believe he was originally designed to function in other lanes.
So, like, unless you're somehow counting Swain and Darius as hook supports...
######EDIT: I can't keep pickrate and winrate straight. Fixed.