The OP asked for advice on how to support her child as she thought her left-handedness was hindering her at school. Good for you, it never made any difference to you. Well done. God help the children in your class if that is your attitude: "I'm fine so just suck it up."
You've given your point...you don't feel any concessions should be made, it's not a disability. We've heard. If you don't have any further constructive advice for OP maybe it's time for you to leave the discussion. This isn't AIBU. OP has disappeared as she didn't expect to be attacked on a simple post asking for advice.
I think that FolkGirl has been totally misunderstood by you,MCDNSAX (sorry-too long to write), other people don't seem to have a problem with it. She isn't saying (and neither am I) 'hard cheese,I'm fine so cope'. Of course left handers should be helped by a teacher, and who better than a left handed teacher who can appreciate the problems? It is sensible to use products, give concessions and give advice to help.
OP wasn't attacked-she was given good advice. The one bit to note is don't draw attention to it, don't make it an excuse.
There is only one thing that I hate, and that is the DC trotting it out as an excuse because they believe it, because they have been continually told it is a problem. It would be so nice if right handers saw it as a positive thing!
Some left handers have problems, some don't. Some left handers are messy writers, some are very neat. Some left handers are very slow writers, some are exceptionally fast. In my experience you could say much the same about boys and imagine on here if you said that boys are inclined to have messy handwriting and be slow writers.
Lots of posters would come on and say 'my DS doesn't have a problem' and my DS is neat and writes with speed'. When I say this as a left hander I get 'bully for you!'
It really isn't a handicap. I am one of the older posters and I was always allowed to be left handed at school. I think that you have to be almost 70 to have had a problem in some schools.
I perfectly happy being left handed, there are minor irritations, but we live in a right handed world. Most people are going want peelers for right handers or irons for righthanders, but it is easy to get them for lefthanders these days.
Tell a DC that they are going to have difficulty and they will!