I personally find it to be a huge impediment in visual creative stuff myself. Whenever I'm doing any serious work I tether a mouse to the computer because the trackpad sucks so ****ing bad on this model. It's the only thing I legit hate about the computer.
The perfect computer for me would be this exact 15" pro with 50% size trackpad and a physical escape key on the left side of the touch bar.
Palm rejection doesn't matter when your fingers and everything else also always hit the thing.
Just proves that you can't please everyone. I also use a mouse, two actually, I use Magic Mouse for research and reference stuff (nothing beats scrolling on it) and I use the great Logitech MX Master for modeling and for certain things in Photoshop. I also use the Wacom Intuos for drawing. I mention all this just to say that I carry a lot of devices with me and have a lot of experience with input devices. Even with all that, I started using the trackpad for more and more stuff - I pan and rotate the Photoshop canvas (works great alongside Intuos), I put in a bunch of gestures there (via BetterTouchTool) and I actually prefer it to a mouse to select, transform and manipulate layers. I also want to point out I never used it this way when I had the old trackpad - it's the size that increased precision and ease of use for me. I also type a lot and it never bothers me - in those few cases I touch it with my palms, the palm rejection works it magic.
But hey, if you don't like it, you don't. You're not wrong or anything, it comes down to personal preference. The only thing that bothers me is that some people act like this was some mistake on Apple's part. No, it wasn't - just as everything else - it was a decision with benefits and downsides. You just happen to be on the side that doesn't have much use of the benefits.