It depends on each situation. In some cases you can find no disadvantages I believe. Moreover, in many cases, external help can come in handy. Say, you are going to present a business project, startup, lead an event but your experience with performing before an audience is insufficient. Then a leadership speaker is here to help you. A decent option to rely on external assistance, isn't it?
Higher costs for the business.
• May not be adequate enough; not given the right skills.
• The more time they spend out of the business and not working, productivity will fall in the short term which again is a cost for the business.
• May not be adequate enough; not given the right skills.
• The more time they spend out of the business and not working, productivity will fall in the short term which again is a cost for the business.