Seems like you chose the cameras based on the batteries rather than other features that were also important to you. In doing so you gave up the shutter release port. Cameras with lower price points have fewer features, Canon or otherwise, so they have to choose how to deliver features. They didn't take away the external release feature, they gave you an alternative which many would prefer that was probably cheaper and more reliable. And it requires no extra, dedicated hardware which few people actually use.
I've got both the M5 and M6II with the remote shutter release and the RC-6. Now that I have the BR-E1, I keep it in my bag and the others are in a storage bin. I like not being tethered to the camera. I found that the physical connection of the cable to camera can impart motion when doing astrophotography with just a slight wind on the cable or movement of my wrist, even when mounted on a serious tripod. These problems disappear with the BR-E1. As a bonus, it works with the R6.
I'm not familiar with the M50 features, but I use the Canon camera app on my iPhone to control my R6 or M6II. Since you it appears you may already have an iPhone, you don't really need the BR-E1. And you can control exposure settings as well. I find it very useful when doing macro work on a copy stand and preferable to the cable release.