Right-hand cursive not suitable for left-handers

Our right-leaning cursive is not suitable for left-handers. Only right-handed people can write like this. Left-handed people tend to write left-leaning.

So why are left-handed people still being forced in schools to write with a right slant and thus can neither develop a beautiful handwriting nor a suitable writing speed?

Because the topic is still missing in teacher training today, just like teaching healthy writing techniques for left-handed people. NO left-handed person would ever have to write with pain in the so-called HOOK POSITION (writing from above)!