Is the comma usage proper in this sentence?

If you want to emphasize your working with clients, you should use long dash instead of comma, imho.

PS. This is a sidebar observation, but why go to the trouble of "be able to be"? Why don't we just say "As a result, I can understand and accommodate...."?

I understand sometimes "be able to" followed by a verb sounds better/nicer than "can" followed by the same verb. But in this case the gerund form just makes it sound so laborious and long-winded.