To simplify - if SQ competition was perceived by the masses to be "more accessible" - then there would be more participants.
SPL competition is not only perceived by the masses as being "accessible", but it also has the luxury of being something that more enthusiasts are attracted into car audio to begin with, so you have a bigger potential base of enthusiasts to draw from right from the get-go.
Since SQ doesn't have this luxury, if anything it needs to try harder at creating the image of it being an "accessible" thing to get into, to attract a decent size participant base.
Perception = reality.
You'll have to pardon me on that- but all the above is not subjective opinion, it's marketing fact.
Granted, there are other approaches to 'attracting a greater customer base' than simply painting the picture of it being "more accessible"..
...but creating a focus on the high-end/expensive things that don't directly relate to sound quality paints the opposite picture.
It makes perfect sense, observing historically, why participation is disappointingly low...
...and why SQ on the whole might be perceived by people as being inaccessible, or "something I can't afford to do".
That's a shame, that's all I'm saying - and that's the only opinion in this whole post. The rest is logic.

