That's one interpretation... the key question is what the law originally intended... I suggest that the lifetime provisions for non-spouse beneficiaries were originally intended for the next generation... kids, nieces and nephews... and NOT for grandchildren and great-grandchildren which is what was advocated by some clever lawyers and CPAs based on how the law was originally written.
Under that view, the SECURE Act is just closing that loophole... but I'll concede that with 10 years that they probably overdid it.
I pretty much agree, except to the extent that I don't think Congress at the time particularly thought through the intent well enough - they could have fairly easily added language to limit stretching to the next generation and not anyone beyond that. I'm not saying that I think Congress had a different intent than what you describe; I'm saying I'm not sure they had much intent.
My parents knew about the stretch IRA loophole - they did well financially and could read, and my Mom in particular was keen on doing everything she could to optimize their finances. They did everything to take advantage of this loophole and possibly put more into their IRAs because the financial landscape encouraged that behavior - including the loophole as well as the other benefits associated with IRAs. They did set it up so their children (me and my siblings) could do the stretch IRA, and that's what we were planning on doing.
Based on my research and my own situation, I had been mulling over disclaiming some of my Dad's traditional IRA to my three kids. It appears this maneuver would have enabled them to stretch it over their lifetime, which I agree with @pb4uski is probably more than Congress intended.
I don't like the arbitrariness of the 10 year timeline, but I know historically that 10 years has been used, so I understand why it was used.
The other two things I don't like is that the SECURE Act, as well as several others, are being attached to the budget bill. I'd rather see Congress do up or down votes on individual bills rather than conglomerations. I understand why they do what they do, and I don't know how to solve it, but I still don't like it.
Second, if everyone agreed that it was a loophole, and by closing the loophole Congress could raise some tax revenue, I would have preferred that they would have closed the loophole far sooner than they did. That way my family could have been disappointed far less and been able to make adjustments sooner and more easily. As it is, even though I agree it is a loophole, it does feel like we were led on since it was around for so long (I think it's been around for several decades).