I’m a lefty but can do many things with either hand. It’s not the actual threading but that the last few steps are out of sight line. You simply can’t see them when you’re sitting in front of the machine. The last hook before the needle must be done sort of from the back which makes no sense. Very poor design by Singer. If I were to ever need another machine, this model lost me as a customer.
I hear you -- I had that on my old White machine. The Singer I bought recently had the last hook in the front, tho. But there are lots of options out there.