Many people lover rolling fir stats. Dude, that's why threads like this exist. You or I dont represent others. Mods don't count.
I think you'd lose a large % of the people saying they'd like to roll for stats if you could just set your stats to whatever value you like. It really isn't much different than changing difficulty. Honestly, Larian could have saved themselves some coding time by allowing you to just pick stats instead of having an easy setting that is really just the equivalent of +4 to every attribute (actually, it's not quite that much of a difference, but you could find some amount of Point Buy differential that would be the equivalent). I can't really say that for Tactician because they added a bunch of other stuff, but Tactician with 38 Point Buy is going to be easier than Tactician with 27 Point Buy, and you still get to see all the Tactician stuff.
