One point here is that RWC tools are designed to pull bearings out of mounts where you can get behind a bearing. If you have two bearings with a spacer pressed into your frame, into a hub or somewhere similar, heck, if you have two bearings in your chainstay pivot, the RWC kit wont help you.
It's designed to push the bearing out using a block on the back side, that is pulled out into a cup, covering the bearing hole. If you have a blind hole, a spacer with another bearing on the other side, etc., you can't install said block. The easiest way is to use a bearing puller (an expanding collet grabbing the bearing with a slide hammer to knock it out), but a screw type puller on the same principle could also be used. I'm not sure anyone sells those though, it also sounds quite expensive to make.
I really need a lathe in my life...
EDIT: slide hammer puller work great, but ideally you're pulling the bearing out from a heavy part. Like an engine block, electric motor housing, transmission casing, etc. With bike frames, we're talking about light parts. You can't really clamp them into anything (you'll bend the frame easily by just clamping it into a vice or at least when hammering away), so someone has to hold the frame or swingarm. Usually it's hard to do it by someone on their own. Using a screw-type blind bearing puller would mean there would still be a cup sitting on the frame right around the bearing, pressing nicely where you have the most material. This means a quick, easy, quiet bearing removal.