Not a silly question, the only silly questions are the ones that aren't asked.
You will get a few different opinions to your question. I think it's fair to say that the great majority of viewers do not see RBE, or are not bothered by it. There is another group that sees it and doesn't care. Finally, there is a group that I think is less than 5% who absolutely can't stand watching a picture through the RBE.
RBE is caused by the physics or optics of the moving wheel interacting with the way our visual perception is wired. Permit me an over-simplification of the DLP process. In DLPs, light is shined through a color wheel that spins. Typically the wheel will have the 3 primary colors, or 2 sets of 3 colors, and may have one or more additional colored or black sectors. The spinning wheel is timed with the DLP chip mirrors to reflect blue, green and red signal each time (or two times) the wheel turns one revolution. This creates the needed primary color components of the each frame of the signal which are then combined with lenses and projected. RBE is in part an artifact of this process in a 1 chip DLP. In a 3 chip DLP you won't see it. As it happens, the faster you spin the color wheel, the less visible is RBE. In recent years wheels have been made to spin faster. Originally they spun at 1X per frame. Now they spin at 3X, 4X, 5CX, or even 6X. There are other design tricks as well that can be used to reduce the effect.
I can see RBE on an old DLP if I turn my head from side to side fast--I catch it out of the corner of my eye. I cannot see it on my Benq W5000 which I think has a 5X wheel.
You should view the DLP you plan to buy to make sure that it does not bother you with RBE. If I recall, the white on black credits at the end of a movie are a good place to try moving your head and/or eyes to see if you can induce the effect. Or watch a couple of movies and if you don't see it, forget it. Remember that it is largely a non-issue for most people on modern projectors. But you have to decide that for yourself.
I love the DLP picture. I find it better than LCD or LCOS. It's a question of taste. Don't let anyone tell you that you need to spend a lot of money to have a decent picture if you find a machine that makes a picture you think you can be happy with. The Benq W5000 floats my boat but it may not be your cup of tea. Use your eyes to look at pictures not read forums.
Good luck looking