[insert "of course she's going to say yes...she's a Realtor" here...] :)
But seriously... there is so much that can happen between identifying the property and closing...this is a definite yes. If you're working with an experienced, reputable real estate professional, you are taking advantage of their negotiating skills, their connections, and their experience navigating potential issues from contract to close. Definitely worth working with an experienced agent!
And (at least in Texas, where I am) -- the sellers are paying the commissions, not the buyer. So as a buyer, it's a no-brainer to be represented.
In 2017, I coordinated 170 transactions. I've been doing this for 6 years. I've seen A LOT. I can say without a doubt that if I was representing myself having only experienced a couple of transactions, I would not be equipped to handle some of the issues that came up during escrow. Partner with a professional -- it helps you reduce your risk...and your stress!