So its immoral for a math tutor to post a flyer about his services in a local coffee shop?

Advertising is a very wide spectrum and I think its way too heavy handed to say it is all intrinsically immoral. Some is, maybe even most of it, but surely not all is immoral.

I'd argue that advertising in general is a good thing, but that there are a few parts that are bad. One bad part is the vast surveillance and privacy intrusion of modern digital advertising is what is bad. Another are the advertising tactics used to manipulate people into buying things they shouldn't.