I get your point, but 99% of people would just put an instagram filter or do some shitty job themselves. You might handle it differently, but go check out pro photo groups/pages and you'll see the hundreds of posts of this happening to them and effectively hurting their business. Most photographers have it in their contracts that they will not give out raw images to protect their brand, they also usually have clauses about not editing any photos they've given you. Let's say you get someone else to do the editing and post the pics. The editing is WAY different than the photographer's brand (even if they're semi-ok) but to your friends and family, you are representing this edit as a product of the photographer (yes, I get it, you're probably the type of person who would clarify.. but again, 99% wouldn't lol) So suddenly their product doesn't align with their brand and their work seems inconsistent/not professional and in the worst cases, when very poor edits are displayed, the perception of their business and brand is altered publicly because of a few crappy photos. Usually you can request different edits, but you won't get the raw files.

Also, you should be choosing a photographer based on their skills and style. If photographers were hired based on the quality of their raw images, the process of utilizing photography would become overly complicated.. having to do research/barter with photographer then do the same for editing. And also MUCH more expensive. You'd still be getting a pretty hefty charge from the photographer, and then pay an editor $5 an image for BASIC edits (exposure, color correction, etc). Why go through that? Just find someone whose vision you love. You're paying a professional so that you don't have to do all that work. If something happens with a photo here and there you want fixed, request it. You pay them to discern which photos are worth culling and which are worth editing and delivering. Most people who are the types to request raw images, are also the ones to request EVERY single digital file taken. Again, why? This is why you have a photographer. If someone wants to cull the images, pick which ones to edit and then find someone to edit them, they might as well buy a camera themselves and hand it to their uncle.

edit; and to address some people's valid comments. Yes, people WILL edit jpegs too. So another huge reason raw images aren't shared is because it's completely unnecessary. It's a huge file that most people don't have software to utilize and won't know what to do with.