I don't know if this is strictly true. I don't deny that blogging about controversial subjects will turn off possible employers or close doors. That is definitely something to be aware of.
But you could look at the flip side of that and say that this is actually filtering out opportunities wouldn't be a fit. Much like qualifying leads in sales is something you want to do as quickly and easily as possible, doing the same for employment opportunities can help you focus on organizations where there is a culture fit.
With respect to your example, if an employer was offended by your support for a minority group or political candidate, is that an employer you'd feel comfortable bringing your whole self to work at?
I may be hopelessly Pollyanna, but I think I'd avoid that type of situation. If you are a software developer and those are the only type of opportunities you have access too, I agree, you should avoid blogging about such controversial topics. Or get good at remote work.
Strictly speaking, the only way my post can be untrue is if "fear of controversy" was not a reason people avoided blogging, or they feared controversy for an entirely different reason than the one I provided.
But you could look at the flip side of that and say that this is actually filtering out opportunities wouldn't be a fit. Much like qualifying leads in sales is something you want to do as quickly and easily as possible, doing the same for employment opportunities can help you focus on organizations where there is a culture fit.
With respect to your example, if an employer was offended by your support for a minority group or political candidate, is that an employer you'd feel comfortable bringing your whole self to work at?
I may be hopelessly Pollyanna, but I think I'd avoid that type of situation. If you are a software developer and those are the only type of opportunities you have access too, I agree, you should avoid blogging about such controversial topics. Or get good at remote work.