it was spot on, actually.
it illustrated that you "can get a cupholder for free" if you ask for it nicely to the very same dealer who just sold you the overpriced car, if he has some cupoholders left and happens to be in good mood and doesn't dislike your face too much. you can also get one for free if you manage to sneak into the shop at night and steal it. that still doesn't make the cupholders free.
second, cupholders are material property and thus not comparable to any software ownership. you consistently overlook this. if cupholders are free, can i visit your dealer with a truck and get two tons of them? of course not, because they are limited in existence, their total cost is fixed and part of your dealer's costs of operations. you "can get some for free" as long as that cost is not exceeded, as long as there are stil cupholders paid for by the vehicle buying customers around.
and cupholders don't need a license, whereas software does. the limited set of cupholders are just commercial gifts to make customers (or even possible customers) happy, and you might do whatever you want with them. you can use them to grow flowers in or give them as a christmas gift to your aunt in texas. you could even build a car around them! you could say the same about mse but then mse specifically requires ownership of a paid, untransferrable license to be used, unless you want it to hold cups on your desk, which you can't since it's software, immaterial property, i hope you finally got that by now.
you wanted to demonstrate with cupholders that mse is free, but just discovered that neither mse nor cupholders are, strictly speaking. good for your analogy! spot on!
of course i was just trying to be funny/picky (whatever) with my first comment, i perfectly understood what the op meant, but i'm afraid you're taking this whole thing too seriously, and no imaginable car analogy will assist you in demonstrating that elephants fly, or that commercial software is free for that matter.