Yes!

This guy "gets it" about that big river in South America that sells books (and lots of other things) online:

Some may wonder, why don’t I use an Amazon link?

I did at one time until a bookseller friend whose work I value greatly challenged me that I was helping to dig the grave of his business. Since I want to see him, and other brick and mortar booksellers stay in business, I paid attention. He pointed out that I was essentially endorsing Amazon as “my bookseller of choice” by directing traffic to their website.…

I’ve concluded that for all the convenience Amazon offers, we are sacrificing a rich, local culture, as well as the subtler delights of relationships with librarians, publishers, and booksellers, as well as the serendipitous delight of finding what you weren’t, as well as were, looking for on the shelves of a local book store. That is not something I want to lose.

<idle musing>
And that's the issue in a nutshell. Sure, you might save a few bucks buying via the river, but what are you doing to the local culture? Not just bookstores, but the local hardware store, or other local businesses?

Buying local puts money back in the community. Buying online drains the community.

Sure, I buy online, but almost always it's only because I can't find what I need locally.
</idle musing>