Ahh... not necessarily. I mean, yes, you can if you do aliexpress but real dropshipping is beyond get order and place it on ali. You need to find companies that provide a dropshipping scheme, which means, you need to sign up(for free, no real wholeseller charges you to buy their product) sign an agreement with them and get their products at a discounted(dropship) price. When you do Ali, you just take advantage of the fact that the China can offer low prices, whereas if you sign up with a dropshipping scheme, you get the same product that you can find on ebay, at a very low price, hence you can resell it.
Does ali not work? Of course it does, you just need to decide what model you want to follow, as everything in life, the secret is hard f*cking work, be beat up, stand up and continue walking with a James Bond smille