I get it. I also used to feel the same way. I got interested in Mechanical Keyboards when @imyke noted that he bought one on a relay show and then I saw the Keychron K2 on MKBHD’s studio tour video. That led me to do some searching on why anyone would want what I considered to be an old and loud keyboard. In short, it is preference. If you love what you are typing on, stick with it. But, there is something unique about typing on switches that have key travel and an a tactile bump to let you know that the key has actuated. These things sound small but, when you type all day, the experience is much better in my opinion. Apple has done a great job making keyboards fit in smaller and smaller spaces. But, this also means that some things are compromised. You can customize the switches to your preference to make typing enjoyable. I used to just type because I had to. Now, I find it enjoyable (kind of like when I got my first Jeep Wrangler and drove with the top down). Some will tell you that because of the tactility and key feel, you will improve your typing speed (I did) but, I have not seen data supporting this view.
In the end, I believe it makes the typing experience better. We spend all day at our keyboards. Why not make that experience more enjoyable? But, it is all about preference. Here is a brief video explaining why some people use mechanical keyboards.