Not an IP lawyer, (those people are EXPENSIVE), It’s perhaps less about the idea than it is about the process to get there. And yes the patent office does make mistakes at times. It’s just expensive and hard to correct those mistakes because it generally takes a judge to do so. And I’m willing to bet this patent is valid in the EU also due reciprocity agreements and trade deals. It would take an EU judge to invalidate the patent, which would cost as much as doing so in the US.
One thing that I have learned over the years is that no patent is actually really valid until a judge bangs a gavel and says yea or nay to the patent, (I’ve held a couple). Until then, it pretty much just a piece of ass-wipe paper you can wavy around and hopefully scare off others that don’t have the money or want to spend the money to challenge the patent.
That’s good for you, in the best way possible. I have not been so fortunate. I do have longer than normal legs. But we all need to adapt and over come in life. Toss in the me being a lefty also and things can be a hassle in day to day living sometimes.
Me, I’m heading out of my 6th decade. Shoveling cow shit, grain, silage, and tossing 50kg/120lbs hay bales nearly every day growing up as kid on a farm got me started on ruining my body early in life. 12 years as a toolmaker standing on concrete 10 to 12 hours a day and lifting heavy pieces of steel, Then 15 years spent dragging 115+kg/250+lbs patients up from basements and down from upstairs bedrooms as a medic has done little to nothing for my back either. A couple of knee surgeries later and now I have a hip that’s starting to act up.