Advertising and marketing spend exist to make people aware of the device's capabilities and its price. I would be surprised to find that any consumer chooses a device because of its marketing spend and retail shelf space.

I’m pretty sure a lot of Apple devices are sold due to the image projected by Apple’s marketing.

That is, indeed, the purpose of advertising.

You wrote “I would be surprised to find that any consumer chooses a device because of its marketing spend”. But advertising does skew consumer choice by its presentation, and the success correlates with marketing spend. It’s far from merely informational. Otherwise we’d just have black on white listings of “this product exists” with spec sheets.

Then why doesn’t Samsung just spend twice as much as Apple and take over the entire market? Are they stupid?