So there's a couple things at play here.
- The post is kind of BS since that whole area isn't just SeaWorld's parking lot (see other comments for more info).
- The amount of parking spots a business must have is regulated. On average it's about 4 parking spots for every 1000 sqft. SeaWorld Orlando is 200 acres. That's a lot of parking spots they're required to have. I agree it definitely ends up being a TON of parking spots most businesses don't need, but it's not the business's fault.
I'm not sure I like this thinking. It's almost making an excuse for the shooter. They could have decided not to shoot at any point. The very fact they made it long enough to shoot with so many eyes on them shows they had a way out without dying.
I know it's a weird argument considering your comment was really about something else, but assuming this was mental illness people have to know that it's never too late. That they could always get help.