Streamline Sales - cheap wholesale dropshippers will take on the tasks of picking, packing and shipping your product for you. The dropship option provide convenience and efficiency, so you can manage your business from anywhere in the world.
High Competition - Because dropshipping has such low barriers to entry, you can bet that a lot of people are doing it. This makes competition stiff and harder to set yourself apart from the crowd.
Low Margins - Maybe one of the biggest disadvantages of dropshipping are the very low margins. This makes it extremely difficult to compete in the paid advertising space and means you'll have to rely more on building content, service etc.
Low magins also means you have to sell at significant volume to make decent profit.