with the proper weighed hammer (for gunsmithing) and the proper nylon punch, switching the sights is not only easy but is also how it is done in the rest of the 99.9% guns that have no sight pusher.
The sight pusher is another Glock accessory sold for newbies. It really helps if you do not have the vise, nor the hammer, nor the punches. However, you will investing more than $150 on a proper sight pusher that is only good for 1 gun.
Learn how to push a sight properly with tools, and now you can do it in any gun.
Speaking from experience, not out of my a$$.
Here is a link of a video, of the one an only Dave Dawson from Dawson Precision (you probably heard of his sights systems):
His sights and Warren tactical are the only ones that I thought were really good value as I have no use, whatsoever, for night sights.