It’s not about vehicle performance expectation (e.g. because a tanker cannot make a switchback turn into Sheetz does not give him the right-of-way to drift into the left lanes prior to the turn.).
The “control” on SB 235, a yield sign, is no more restrictive than the “yield” inherently required of U-turners. However, U-turns are an abrupt, unexpected movement….It’s not like other traffic can see the intentions of the U-turner all the way through an intersection. For this reason, it’s up to the U-turner to “yield the right-of-way to any approaching vehicle that is so near as to be an immediate danger” per State law.
We may just have to agree to disagree on this one (I’m NOT challenging you to a trip to the Lake, since you’re the only one that ever returns), with the possible exception that we both agree that SHA should provide better guidance/signing at the intersection.