Haven't done this in a while sooooo
I've been really into corsets recently, and a fun fact about those are that not only would they displace your organ really badly, they also caused fainting and sometimes death from the organ displacement I mentioned earlier... fun!
Only in cases of extreme tight lacing and in people who didn't work their way up to the extremes in a slow manner - if given enough time and done carefully you could reasonably move your organs around and have them adjust to the constriction without dire effect as long as you didn't live a super active lifestyle. Ribs were not broken intentionally to do this, however it did happen.
Corsets were worn
comfortably for everything including pregnancy (and no, they didn't tight lace) to high activity sports, and they had corsets for literally everything you could think of. Pregnancy corsets had extra panels so it could expand with you as you grew and helped take the pressure off your back. Sports corsets were usually made out of light mesh and were super flexible so you could run and jump around.
And keep in mind that modern day corsets, unless you buy them from someone who knows what they're doing, don't have the same gores, panels, and shaping that vintage ones did. Vintage corsets were designed to go over your hips in a contour, not a straight tube like cheap modern ones. You also have to break a corset in so that the boning will form to your body shape in a comfortable manner.
Tight lacing was an extreme fashion thing, much like people tattooing their entire body. Most people wouldn't do it. And the reason we think that everyone tight laced was because Victorian fashion panels were hand drawn and so much like modern day cartoons they exaggerated a lot of features. On top of that many women would use padding, not tight lacing, to achieve the desired fashionable silhouette.
Oh! Another fun fact! Men also wore corsets in the high fashion societies.
