You can of course pay for SEO, but that's my whole point. At some point, you're not willing to pay $50(USD) an hour to get the last few percent of profit, especially if your gross income is fairly small.
Also, I believe unless you set the robots.txt file, most sites are crawlable, and SEO, like I said, is not really important for smaller businesses. Mostly they are existing customers who want to find out hours of operation and maybe any daily specials you might have, not somebody who stumbles across your site organically.
One major UK site made a simple mistake with the canonical tag on one of 12 websites cost them over £500,000 in lost traffic in lest than a week.
If you start making a lot of money, you'll have enough to hire high priced consultants. If you're just starting up and concentrating on your actual busines, not IT, you shouldn't be worried about the best web framework.
Also, for businesses just starting up, you just need simple HTML. The only information you need to expose are hours of operation, address, and a list of services/goods with prices. Everything else can come later, when you're getting enough business to justify it.
My main point is that small webdevs are going to start getting starved for work. They're getting replaced by generated HTML which do a good enough job for free.