There will always be tinkerers. It's only human to want to test and explore possibilities. Some people dont have the financial means to send a $50 camera out for a $150 cla. So people should not worry too much about stressing DIY or professional cleaning to others. Lots of people are very talented with mechanics naturally, even if their main job is not in that field. I am also sure many professionals in camera repair have trashed just as many cameras too.
I would stress that people go ahead with each option intelligently. Weigh the importances of each choice and ultimate consequences of it. If you do choose DIY find as much information like online guides, service manuals, and repair books. The right tools for the job go a long way. Photograph your steps if particularly complex. And most importantly take your time and think!