It wasn't really invented, per se. It was an outcome of the IRA rules for beneficiaries that were pretty simple... a spouse beneficiary had to withdraw under the rules that would normally apply to them and non-spouse beneficiaries would have to withdraw over their lifetime (like RMDs). Makes perfect sense to a 1974 legislator.
Then someone gets clever and devises a strategy to defer taxes even longer.. by naming a grandchild or great-grandchild as a beneficiary.
You seem to assume that this inter-generational transfer wasn't an intended part of the legislation. And thus, you aren't bothered if it that benefit is taken away now.
Of course 401ks weren't "intended" to become the basis for retirement savings for the masses, replacing pensions. Yet, that's what happened.
Would you be bothered if they were taken away now?