First, his main argument is that the user of software should have the right to inspect and modify that software. So just benefiting indirectly from proprietary software does not seem a contradiction: his--and the user's--freedoms are not infringed by using things that may have been manufactured with proprietary software.
Secondly, he does not believe that certain classes of software (like in your microwave) need to be free because they are basically part of the hardware. I imagine that if he owns a car, it only has low-level control software for the engine which is basically the same but not, say, a proprietary GPS system.
In planes it is again not an issue: he doesn't own the plane, so even if it had fully free software he would not benefit. I imagine if he ever did get a plane, he would want one with free software, but that isn't particularly pertinent since he will never buy a plane.
So the things you pointed out are not infringements of his rights--they're infringements of the rights of the manufacturer or the plane company. Stallman tries to persuade people like that to stand up for their rights, but that is all he does.
Secondly, he does not believe that certain classes of software (like in your microwave) need to be free because they are basically part of the hardware. I imagine that if he owns a car, it only has low-level control software for the engine which is basically the same but not, say, a proprietary GPS system.
In planes it is again not an issue: he doesn't own the plane, so even if it had fully free software he would not benefit. I imagine if he ever did get a plane, he would want one with free software, but that isn't particularly pertinent since he will never buy a plane.
So the things you pointed out are not infringements of his rights--they're infringements of the rights of the manufacturer or the plane company. Stallman tries to persuade people like that to stand up for their rights, but that is all he does.