Like everything we discuss here, it'll depend on the face of tango in your area.
The main venue for large modern tango orquestas here is (or was . . . the studio owner just passed away) an absolutely massive dancehall located in a sprawling shopping mall. Just 1/3 of the danceable area is larger than the next-largest milonga here, and when it's all opened up, it can hold hundreds of dancers dancing at the same time, plus more people seated and at the bars. They host country dance, Latin dance, line dance, swing dance, and non-style-specific parties that attract hordes of people all week – so they are very much "on the radar" – and they cross-advertise all of their events. Whenever they host live tango music, there's a significant number of non-tango people sitting around, having a drink, treating it as a show rather than as a dance party, and the organizers of the tango side of their programme definitely recruit students thanks to this.
Our arts district regularly has traveling tango shows, sometimes even in its headlining venues. We have two tours coming up this spring alone. These are always done with a nod to the local teaching and performing community – typically, it'll be made very clear where you can learn tango locally if you like what you see. One teaching couple in particular picks up a lot of students that way. (My own coach was associated with such a show for years, and when they came here, it certainly helped fill her calendar with private lessons.)
A very popular televised local dance competition has had tango dancers make it to the final rounds on several occasions. Thanks to that fame, two of the dancers ended up with a lot of students afterward. One in particular is teaching show tango almost full-time thanks to that – and like 'em or hate 'em, his dancers do come to milongas.
Honestly, next to all of the above, the Tango BA qualifiers were not particularly well attended, though it was still the case that most of the spectators weren't dancers, and that some decided to learn.
To estimate numbers: The show bar brings in hundreds at a time and thousands over the year. The touring shows are comparable in influence. The TV show reaches millions. The qualifiers attract only tens.
So, I think the commercial, showy, non-community-building side of tango very definitely brings in the general public where I live. I acknowledge, though, that these experiences are local and not universal! It might be a peculiarity of my region that there are huge show venues with mainstream advertising, bolstered by network television.