There are only 900 billionaires in the U.S. Do you think if they lost their voting rights it would affect the outcome of even a single election whatsoever?
If it includes ability to vote via campaign donations that cause votes, then yes absolutely. Note for instance in the Massie primary, rich donors literally turned money into new votes by prodding a bunch of demented elderly people who never vote in primaries to believe Massie was banging AOC and Ilhan Omar and secretly a democrat (the vote from regular primary voters remained almost unchanged, the delta was almost entirely new voters brought out by a fraudulent propaganda campaign). That's essentially indistinguishable from those rich people having cast the vote themselves.
I mean if all the people that voted last primary voted basically the same you have some sort of control group, the only significant delta in that primary was a huge group of very elderly people that don't vote in the primaries except this time that showed up after they were targeted for a hilariously false campaign with Isreali AIPAC money.
If the control group changed as well I'd agree with you, but the delta here was basically a huge group of demented people that were specifically targeted to show up in a one-off. It's hardly just disingenuously brushed away as some "other people" that just changed their mind after labeling the other guy's opinion as propaganda because they disagreed.
So put in the enormous effort needed to change the Constitution all towards a goal of some superficial and ineffective measure instead of taking a fraction of that effort and putting it towards actual concrete things that might improve society like better health care, better education, infrastructure.