Grooming eyebrows is a necessary evil for many people - male or female. Some people end up with crazy hairs that stick out, unibrows, hairs that grow down into the eye folds, and just look very crazypants if not taken care of. I'm not even talking about getting model-ready eyebrows, just trying to get typical non-werewolf looking.
You can pluck the hair yourself at home, using tweezers. Simple, cheap but very time consuming and difficult to do if you have less than perfect eyesight, since you can't wear glasses while doing this without difficulties.
You can wax them yourself at home using kits purchased from the store. Usually they are the "heat up in the microwave" waxers, but can be relatively cheap. It is more difficult to master since you're smearing very hot wax onto your own eye area and might not do a great job of it so end up with brows that need further refining and it sometimes fucking hurts if you misjudge the heat settings or glop it on wrong... it really is kind of sucky to do at home.
Or you can pay someone to get a wax or threading. Wax is again, smearing hot wax onto the areas that have hair, and then allowing it to cool slightly so when ripping it off, it pulls the hairs out in mass from that area. Having a professional do this is hella easy and fast and they have professional level wax things that remove the chances of burning the shit out of your fucking eyebrow area. Do this one time, and you'll be much more appreciative of paying someone to do it for you.
Threading is something I don't think anyone could do themselves because it requires a fine thread wrapped around the hair shafts and then pulled out by pulling on the thread. It is better for sensitive skin or those with allergies that would risk complications from the hot wax method. I know someone that gets threaded because her skin is so delicate, she would end up losing a layer of skin and looking like a burn victim for days after waxing, but lacked decent enough vision to pluck her own eyebrows.
I don't begrudge anyone paying to get any of this done professionally because it is cheaper and better in many cases to pay someone to do it for you. I do my own brows at home with tweezers now, but that's me.