If you find it really interesting then I'd honestly say to go for it. A lot of universities argue that their courses are very different to A-levels, and aren't too concerned about which ones you pick (with some exceptions ofc, such as maths and physics A-levels for engineering university). So even if you want to do something else in the future it isn't a bad idea to pick sociology. Plus you're a lot more likely to do well on an A-level you're interested in than one you're doing just for the sake of it lol.
I think the best thing to do is have a look at what degrees you want to pursue (that lead to jobs which meet your expectations/you're really interested to work at). See if they have required subjects you need to do and switch out your subjects accordingly. I reckon you could keep sociology and switch out another one of your subjects, though ultimately it's up to you.
Hope this helped