I think speculation plays an important role in trading because if a trader picks the right trade and speculates accurately then its very likely to have high returns.
The moment they engage in speculation trading instead of carryout research, relying on experience or reading and understanding the movement of the charts, they seize to be worthy of been called a trader. They become more of a gambler which rely on luck as a major factor for winning and most times they can't replicate their wins. Trading I always say is more than just buying and selling, it's a skills which involves learning, practice, experience, dedication etc. If a trader don't have any of these I don't think
that individual is worthy of been called a trader, he/she is just a gambler.
I totally agree with at least 90% of your point but I think you missed out when you made it look like any trader that engages in speculation is no trader. You have to break the type of trading down, even when a trader has fulfilled all the listed attributes in your point, they will still not go far without speculation, it is when they speculate using intuition rather than the Technical analysis tool that they become a gambler.
The TA tool we have been talking about, is it not more of a speculative tool? And any trader cannot trade successfully with making use of Technical and analysis tool, so not all traders that engage in speculation sometime are not traders, it just depends on how professional they are about it.