Professional experienced designers don't tend to compete in the same customer pool as instant logo makers.
Those places along with the logo factories compete for customers who are looking for a cheap solution and mistakenly don't place any value on brand image, and hence that is what customers they appeal to.
Experienced designers tend to cater to businesses who take their brand identity very seriously and who need a design service/solution that will not only offer the identity, but can provide ongoing marketing design and support for the forseeable future.
Companies who pay more intend to use their logo as it should be used - as a brand marketing tool to develop their business and increase profits. If you are going to do that you really do need a proper design and most businesses recognise that this isn't going to come at bargain prices, and must be custom designed rather than off the shelf.
In addition, they in most cases need a design firm that has the experience and capability to stick with their company for the future and enhance their marketing. You can't get that from Logo Instant