I totally agree that at Saints we aren't maximising our crowds at the moment. But there are a number of issues to consider:
Financial viability is a big one. To exist year in,year out, clubs are realising they need to depend on memberships. If you depend on big blockbuster games for your cash flow, what happens when you have a couple of bad years in a row? What happens when it rains like cats and dogs for the week before your blockbuster? There are so many examples of this...but to name one recent one, Tigers vs Bulldogs at ANZ should be a 30,000 crowd minimum, but got 11,000 a few weeks ago (due to rain and, perhaps, form), well below what both club would expect to get even against an out of town team . For us, its about establishing a culture of membership. Its about getting people into the habit of signing up, and then it just becomes a renewal issue. What people dont understand is that moving a blockbuster might result in short term gain but long term pain, because it undermines the whole thing. You've got no idea how many people sign up for Kogarah memberships BECAUSE it is kogarah. There was a protest vote of not becoming members in 2008 at ANZ to send a strong message to the club that we didnt want to be based there. If you undermine that, and at the last minute change a blockbuster away from home, then it gives people a reason not to sign up. Whats the point in being a member to "guarantee your seat" if they're just going to move it anyway?
Then you've got the old home ground advantage line. I won't flog this dead horse but, despite the result in the end, I'm sure Parra would have been ecstatic if we'd moved our home final to the SFS. Whilst it (obviously) doesnt guarantee you a win, if its a 5% better chance, we'll take it.
Also, a commitment to the stadium will bode well for future redevelopment. The Bulldogs and Souths never stood a chance of getting Belmore and Redfern redeveloped to a suitable standard to be full time home grounds in my opinion because they abandoned ship. If you show a commitment to your area, and demonstrate a need for development (through sellouts) you stand a much bigger chance of getting it (unless you're Manly).
Finally, we're a complicated club because we have two home cities. Where as other clubs, like say the Dogs, can take a game to Adelaide and a game to Brisbane and its barely noticed, if you take one of the six games away from either Kogarah or Wollongong, its noticed and missed.
I know I've gotten off topic and gone down a membership/stadium topic rather than crowds. I love big crowds as much as everyone, and would be lying if I wasn't jealous when Canterbury, Souths, Tigers and Roosters get those occasional massive 30-40,000 crowds at ANZ/SFS. And I bloody love the see of red and white on ANZAC Day. But I'm very happy with the direction the club is taking with regard to our home grounds.
If only we could sort the jersey disasters out and win a finals match!!