Bitcoin is as excellent as it is not so much because of what it can do, but also because of that you can not do.
Adopting an inaccurate and indefinite exponential growth proposal based on extrapolations is folly and hubris. It introduces new failure modes. It just isn't worth it.
Yup. But that's not what anybody advocated, so why are you bothering to say it would be bad?
The proposal is not indefinite exponential growth; it's exponential growth for 20 years.
Nor does it seem particularly inaccurate to me; as I pointed out already.
Finally, there is no such thing as a course of action to prepare for the future that is not based on some form of extrapolation or prediction. But that doesn't mean failing to be prepared is a good idea.
And I still have no idea what miner would deliberately lose money by taking block size up to the very limit using bogus transactions, or why they would try to. We're talking these days about people running actual businesses that they have invested major resources in and want to see some ROI. This is not just set of randoms that's going to contain trolls who came along just to wreck things for lulz. So I'm just not seeing the immediate threat model of a ridiculously enormous block-chain that you claim to see.