That would help but some of what I found annoying was the delay in transitioning between modes and software generally not designed with tablet mode in mind. Not sure if the situation has improved in the last few years on those points.
Not sure if that's changed over time or not but transition speed is more or less the same between the two in my experience. There's some software which does a decent enough job at tablet mode (enough that I don't feel the need for a separate tablet - basically media consumption type activities - ebook readers, Netflix, etc are covered well enough and web browsing works for me) and the surface pro form factor feels much better for things like note taking using the surface pen in my experience (my work laptop is a Yoga, personal laptop is a Surface Pro so I use both regularly). On the negative side, the Surface Pro does make some different compromises - particularly the type cover isn't quite as good as the Yoga laptop keyboard (though of course any laptop keyboard is never that great) and the stand which folds out of the back isn't as good as having a laptop supported by the base if you have it on anything other than a decent desk. But overall I'd say the Surface Pro gets much closer to a true 2 in 1 device.
You can't even turn off the touch screen when in laptop mode, so every time you brush the screen when typing (it happens a lot, the device is tiny) you end up messing up something.
Microsoft, for all its qualities, truly does not care about the finer details.