I think this is well said. But imo you overemphasize being "liked." In a junior position that would be true, whether trading or anything else. The more senior the position, the more what you are actually able to accomplish matter.
Quote from PeterEastgate:
Your resume is virtually useless and means nothing. The main qualities that companies look for in hiring and promoting is 1) a high level of likeability and persuasiveness, 2) superior communications skills(do people listen to you and do they like what they hear when you speak?), 3) excellent work ethic and reliability, 4) ability to pick-up complex tasks quickly and execute in a hasty, but accurate, manner and 5) ability to sell.
If you have those skills, then you will be hired by anyone and they will teach you the business. During the first minute of the interview process, these traits are usually abundantly clear.
Older workers are being put out of work and its not because they do not know the job, but its because their communications skills have lessened over time. They have become jaded because of life's little difficulties.
I wouldnt worry about wasting your time with the trading enterprise. If you can't communicate effectively and are not that likeable of a person then you probably wont get hired anyway.