They were asked to make a 100,000$ gaming PC. Even with bleeding edge components and storage out the ass, you’re still 90 grand short. So a one-off, ridiculously over-the-top case is as good a place as any to put the rest of the money.
Even if the US and EU pony up the not insignificant amount of cash to do it, there’s still nothing that can put 1000t into orbit, let alone L1. And splitting it up into 100t segments isn’t a solution, since L1 is unstable. The segments will need power, thrusters, gyros, propellant and guidance for station-keeping, so there goes a large chunk of your mass budget. To compensate for that, you need more mirrors. And they need to be continuously replaced as they break down or run out of propellant.
There’s truth to this. I recall an old saying, went something like “Chicks dig giant robots.”