Yes, the issue is not symmetric. But the economics just don't make sense: the person paying for privacy isn't getting it, and the people getting paid for that service are.
Discussion
Also, efficiency does matter. It's not good if you need to do 1000's of coinjoins to get reasonable privacy. Block size is limited.
The only choice is to be a maker and taker. Run a maker for years and act as a taker when you want to make a tx. Also, a fidelity bond is a cost that makers pay, even if the cost is just opportunity and tx fees.