Is Amazon FBA actually useful for boosting sales?

yes, the article you were reading is correct. there are multiple reasons for this few of them are
1- Huge organic traffic
2- seller and buyer-friendly
3- Responsibility of amazon
the above is the reason why you should choose fba. saves your time, no worry about traffic, amazon responsibilities.
due to this you’ll put all of your efforts to your business that ultimately boost your sales.

Using Fulfillment by Amazon (FBA) has the potential to significantly boost sales compared to Fulfillment by Merchant (FBM) for several reasons. Firstly, by enrolling in FBA, your products become eligible for Amazon Prime. Additionally, FBA provides a high level of customer trust through its reliable fulfillment and shipping services, efficient order handling, and dedicated customer support. Also, FBA enhances the overall customer experience with features like hassle-free returns, easy exchanges, and the renowned customer service provided by Amazon.

Yes, Amazon FBA can be useful for boosting sales due to advantages like Prime eligibility, increased chances of winning the Buy Box, reliable fulfillment services, customer trust, and access to a wide customer base.