I feel like you are very confused with the difference between trader and stockbroker. And judging from the posts, it seems like you are asking to become trader, so here are some points to consider.
Pros:
1. For newcomers, deposit less capital with leverage along with bracket and cover order (only for intraday)
2. Able to make money consistently (weekly/monthly) if done right.
3. Financially independent. The boss of money. Make or break
Cons:
1. Lots of learning and practice. A mistake may cost everything.
2. Overcome with greed and overconfident may cause bigger problem in trading.
3. Loss is a part of trading life.