There’s a huge difference between being a stock/bond manager and managing a pool of real estate, private companies, commodities, currencies, etc.
Since you mention bonds, I’ll address those. Your original post said ‘allow for better and more consistent returns’. If you want to develop your skill-set to make you an attractive colleague at a successful bond trading firm, you first need to identify what a successful bond trading firm looks like. How would we define success? Well, I’d suggest that we define success as the ability to deliver returns to clients that are higher than average for the industry…like you say, better and more consistent.
Since we know that passive bond funds outperform active bond funds >90% of the time over any long investment time horizon, and the number goes up as we add more time to the equation, I think we can safely define a successful bond manager as one who can capture fixed income market returns at a low cost, with low turnover and high tax efficiency. Now, the skill-set that would be attractive to one of those managers would be a person who thoroughly understands how to trade in fixed income markets, how to measure market liquidity, how to understand the risk involved in each trade…as well as obviously having a strong understanding of the flaws of active management so that they’re not tempted to deviate from the defined strategy of the fund.