Putting clothes on statues makes them look like a big doll.... If you prefer that look then that's cool, but a lot of us like are statues to look like well statues.
It's funny how you word this in such a way where you imply that people who like mixed media statues actually want dolls, not statues.
The fact is, there are mixed media pieces that look amazing, and fully sculpted pieces with dull, flat, plastic-looking paint jobs that make it look like a giant toy. Similarly, there are horribly tailored mixed-media pieces, and amazingly painted fully sculpted pieces. I wouldn't generalize either way, as it's all about execution.
For those who really dislike mixed media, PFs are an odd choice to collect, considering that mixed media is a Sideshow trademark, and probably 95% of PFs have some cloth or mixed media element.