Changing wheels will not cause a tire to blow. This is a well known, well documented problem all over the Internet, Goodyear, Carlisle, you name it. If you were incredibly ignorant, you could get a rim way too narrow and wear the center, or wayyyy wide, and have it run on the sidewalls, but anybody that couldn't tell a problem there shouldn't be pulling a trailer.
I suspect most people on this forum get lucky for two reasons.
1. The trailers are
light, and the
tires don't get maxed out much.
2. They have undersized tow vehicles, and are staying safe and driving slow.
Guys with large campers, car trailers, and bigger tow vehicles are much more likely to see these issues pop up due to
weight and speed.